import java.util.Scanner;
public class Main {
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        String n = scan.nextLine();
        while(scan.hasNext()) {
            n = n + scan.nextLine();
        }
            System.out.println("a : " + counter('a', n));
            System.out.println("b : " + counter('b', n));
            System.out.println("c : " + counter('c', n));
            System.out.println("d : " + counter('d', n));
            System.out.println("e : " + counter('e', n));
            System.out.println("f : " + counter('f', n));
            System.out.println("g : " + counter('g', n));
            System.out.println("h : " + counter('h', n));
            System.out.println("i : " + counter('i', n));
            System.out.println("j : " + counter('j', n));
            System.out.println("k : " + counter('k', n));
            System.out.println("l : " + counter('l', n));
            System.out.println("m : " + counter('m', n));
            System.out.println("n : " + counter('n', n));
            System.out.println("o : " + counter('o', n));
            System.out.println("p : " + counter('p', n));
            System.out.println("q : " + counter('q', n));
            System.out.println("r : " + counter('r', n));
            System.out.println("s : " + counter('s', n));
            System.out.println("t : " + counter('t', n));
            System.out.println("u : " + counter('u', n));
            System.out.println("v : " + counter('v', n));
            System.out.println("w : " + counter('w', n));
            System.out.println("x : " + counter('x', n));
            System.out.println("y : " + counter('y', n));
            System.out.println("z : " + counter('z', n));
    }
    public static int counter(char c, String line){
        int sum = 0;
        for(int x = 0; x < line.length();x++){
            if(c == line.charAt(x)){
                sum++;
            }
            else if(Character.toUpperCase(c) == line.charAt(x)){
                sum++;
            }
        }
        return sum;
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        String n = scan.nextLine();
        while(scan.hasNext()) {
            n = n + scan.nextLine();
        }
            System.out.println("a : " + counter('a', n));
            System.out.println("b : " + counter('b', n));
            System.out.println("c : " + counter('c', n));
            System.out.println("d : " + counter('d', n));
            System.out.println("e : " + counter('e', n));
            System.out.println("f : " + counter('f', n));
            System.out.println("g : " + counter('g', n));
            System.out.println("h : " + counter('h', n));
            System.out.println("i : " + counter('i', n));
            System.out.println("j : " + counter('j', n));
            System.out.println("k : " + counter('k', n));
            System.out.println("l : " + counter('l', n));
            System.out.println("m : " + counter('m', n));
            System.out.println("n : " + counter('n', n));
            System.out.println("o : " + counter('o', n));
            System.out.println("p : " + counter('p', n));
            System.out.println("q : " + counter('q', n));
            System.out.println("r : " + counter('r', n));
            System.out.println("s : " + counter('s', n));
            System.out.println("t : " + counter('t', n));
            System.out.println("u : " + counter('u', n));
            System.out.println("v : " + counter('v', n));
            System.out.println("w : " + counter('w', n));
            System.out.println("x : " + counter('x', n));
            System.out.println("y : " + counter('y', n));
            System.out.println("z : " + counter('z', n));
    }
    public static int counter(char c, String line){
        int sum = 0;
        for(int x = 0; x < line.length();x++){
            if(c == line.charAt(x)){
                sum++;
            }
            else if(Character.toUpperCase(c) == line.charAt(x)){
                sum++;
            }
        }
        return sum;
    }
} Main public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        String n = scan.nextLine();
        while(scan.hasNext()) {
            n = n + scan.nextLine();
        }
            System.out.println("a : " + counter('a', n));
            System.out.println("b : " + counter('b', n));
            System.out.println("c : " + counter('c', n));
            System.out.println("d : " + counter('d', n));
            System.out.println("e : " + counter('e', n));
            System.out.println("f : " + counter('f', n));
            System.out.println("g : " + counter('g', n));
            System.out.println("h : " + counter('h', n));
            System.out.println("i : " + counter('i', n));
            System.out.println("j : " + counter('j', n));
            System.out.println("k : " + counter('k', n));
            System.out.println("l : " + counter('l', n));
            System.out.println("m : " + counter('m', n));
            System.out.println("n : " + counter('n', n));
            System.out.println("o : " + counter('o', n));
            System.out.println("p : " + counter('p', n));
            System.out.println("q : " + counter('q', n));
            System.out.println("r : " + counter('r', n));
            System.out.println("s : " + counter('s', n));
            System.out.println("t : " + counter('t', n));
            System.out.println("u : " + counter('u', n));
            System.out.println("v : " + counter('v', n));
            System.out.println("w : " + counter('w', n));
            System.out.println("x : " + counter('x', n));
            System.out.println("y : " + counter('y', n));
            System.out.println("z : " + counter('z', n));
    } main {
        Scanner scan = new Scanner(System.in);
        String n = scan.nextLine();
        while(scan.hasNext()) {
            n = n + scan.nextLine();
        }
            System.out.println("a : " + counter('a', n));
            System.out.println("b : " + counter('b', n));
            System.out.println("c : " + counter('c', n));
            System.out.println("d : " + counter('d', n));
            System.out.println("e : " + counter('e', n));
            System.out.println("f : " + counter('f', n));
            System.out.println("g : " + counter('g', n));
            System.out.println("h : " + counter('h', n));
            System.out.println("i : " + counter('i', n));
            System.out.println("j : " + counter('j', n));
            System.out.println("k : " + counter('k', n));
            System.out.println("l : " + counter('l', n));
            System.out.println("m : " + counter('m', n));
            System.out.println("n : " + counter('n', n));
            System.out.println("o : " + counter('o', n));
            System.out.println("p : " + counter('p', n));
            System.out.println("q : " + counter('q', n));
            System.out.println("r : " + counter('r', n));
            System.out.println("s : " + counter('s', n));
            System.out.println("t : " + counter('t', n));
            System.out.println("u : " + counter('u', n));
            System.out.println("v : " + counter('v', n));
            System.out.println("w : " + counter('w', n));
            System.out.println("x : " + counter('x', n));
            System.out.println("y : " + counter('y', n));
            System.out.println("z : " + counter('z', n));
    } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) String n = scan.nextLine(); n scan.nextLine() scan.nextLine scan while(scan.hasNext()) {
            n = n + scan.nextLine();
        } scan.hasNext() scan.hasNext scan {
            n = n + scan.nextLine();
        } n = n + scan.nextLine() n n + scan.nextLine() n scan.nextLine() scan.nextLine scan System.out.println("a : " + counter('a', n)) System.out.println System.out System System.out "a : " + counter('a', n) "a : " counter('a', n) counter 'a' n System.out.println("b : " + counter('b', n)) System.out.println System.out System System.out "b : " + counter('b', n) "b : " counter('b', n) counter 'b' n System.out.println("c : " + counter('c', n)) System.out.println System.out System System.out "c : " + counter('c', n) "c : " counter('c', n) counter 'c' n System.out.println("d : " + counter('d', n)) System.out.println System.out System System.out "d : " + counter('d', n) "d : " counter('d', n) counter 'd' n System.out.println("e : " + counter('e', n)) System.out.println System.out System System.out "e : " + counter('e', n) "e : " counter('e', n) counter 'e' n System.out.println("f : " + counter('f', n)) System.out.println System.out System System.out "f : " + counter('f', n) "f : " counter('f', n) counter 'f' n System.out.println("g : " + counter('g', n)) System.out.println System.out System System.out "g : " + counter('g', n) "g : " counter('g', n) counter 'g' n System.out.println("h : " + counter('h', n)) System.out.println System.out System System.out "h : " + counter('h', n) "h : " counter('h', n) counter 'h' n System.out.println("i : " + counter('i', n)) System.out.println System.out System System.out "i : " + counter('i', n) "i : " counter('i', n) counter 'i' n System.out.println("j : " + counter('j', n)) System.out.println System.out System System.out "j : " + counter('j', n) "j : " counter('j', n) counter 'j' n System.out.println("k : " + counter('k', n)) System.out.println System.out System System.out "k : " + counter('k', n) "k : " counter('k', n) counter 'k' n System.out.println("l : " + counter('l', n)) System.out.println System.out System System.out "l : " + counter('l', n) "l : " counter('l', n) counter 'l' n System.out.println("m : " + counter('m', n)) System.out.println System.out System System.out "m : " + counter('m', n) "m : " counter('m', n) counter 'm' n System.out.println("n : " + counter('n', n)) System.out.println System.out System System.out "n : " + counter('n', n) "n : " counter('n', n) counter 'n' n System.out.println("o : " + counter('o', n)) System.out.println System.out System System.out "o : " + counter('o', n) "o : " counter('o', n) counter 'o' n System.out.println("p : " + counter('p', n)) System.out.println System.out System System.out "p : " + counter('p', n) "p : " counter('p', n) counter 'p' n System.out.println("q : " + counter('q', n)) System.out.println System.out System System.out "q : " + counter('q', n) "q : " counter('q', n) counter 'q' n System.out.println("r : " + counter('r', n)) System.out.println System.out System System.out "r : " + counter('r', n) "r : " counter('r', n) counter 'r' n System.out.println("s : " + counter('s', n)) System.out.println System.out System System.out "s : " + counter('s', n) "s : " counter('s', n) counter 's' n System.out.println("t : " + counter('t', n)) System.out.println System.out System System.out "t : " + counter('t', n) "t : " counter('t', n) counter 't' n System.out.println("u : " + counter('u', n)) System.out.println System.out System System.out "u : " + counter('u', n) "u : " counter('u', n) counter 'u' n System.out.println("v : " + counter('v', n)) System.out.println System.out System System.out "v : " + counter('v', n) "v : " counter('v', n) counter 'v' n System.out.println("w : " + counter('w', n)) System.out.println System.out System System.out "w : " + counter('w', n) "w : " counter('w', n) counter 'w' n System.out.println("x : " + counter('x', n)) System.out.println System.out System System.out "x : " + counter('x', n) "x : " counter('x', n) counter 'x' n System.out.println("y : " + counter('y', n)) System.out.println System.out System System.out "y : " + counter('y', n) "y : " counter('y', n) counter 'y' n System.out.println("z : " + counter('z', n)) System.out.println System.out System System.out "z : " + counter('z', n) "z : " counter('z', n) counter 'z' n String[] args args public static int counter(char c, String line){
        int sum = 0;
        for(int x = 0; x < line.length();x++){
            if(c == line.charAt(x)){
                sum++;
            }
            else if(Character.toUpperCase(c) == line.charAt(x)){
                sum++;
            }
        }
        return sum;
    } counter {
        int sum = 0;
        for(int x = 0; x < line.length();x++){
            if(c == line.charAt(x)){
                sum++;
            }
            else if(Character.toUpperCase(c) == line.charAt(x)){
                sum++;
            }
        }
        return sum;
    } int sum = 0; sum 0 for(int x = 0; x < line.length();x++){
            if(c == line.charAt(x)){
                sum++;
            }
            else if(Character.toUpperCase(c) == line.charAt(x)){
                sum++;
            }
        } int x = 0; int x = 0; x 0 x < line.length() x line.length() line.length line x++ x++ x {
            if(c == line.charAt(x)){
                sum++;
            }
            else if(Character.toUpperCase(c) == line.charAt(x)){
                sum++;
            }
        } {
            if(c == line.charAt(x)){
                sum++;
            }
            else if(Character.toUpperCase(c) == line.charAt(x)){
                sum++;
            }
        } if(c == line.charAt(x)){
                sum++;
            }
            else if(Character.toUpperCase(c) == line.charAt(x)){
                sum++;
            } c == line.charAt(x) c line.charAt(x) line.charAt line x {
                sum++;
            } sum++ sum if(Character.toUpperCase(c) == line.charAt(x)){
                sum++;
            } Character.toUpperCase(c) == line.charAt(x) Character.toUpperCase(c) Character.toUpperCase Character c line.charAt(x) line.charAt line x {
                sum++;
            } sum++ sum return sum; sum char c c String line line public class Main {
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        String n = scan.nextLine();
        while(scan.hasNext()) {
            n = n + scan.nextLine();
        }
            System.out.println("a : " + counter('a', n));
            System.out.println("b : " + counter('b', n));
            System.out.println("c : " + counter('c', n));
            System.out.println("d : " + counter('d', n));
            System.out.println("e : " + counter('e', n));
            System.out.println("f : " + counter('f', n));
            System.out.println("g : " + counter('g', n));
            System.out.println("h : " + counter('h', n));
            System.out.println("i : " + counter('i', n));
            System.out.println("j : " + counter('j', n));
            System.out.println("k : " + counter('k', n));
            System.out.println("l : " + counter('l', n));
            System.out.println("m : " + counter('m', n));
            System.out.println("n : " + counter('n', n));
            System.out.println("o : " + counter('o', n));
            System.out.println("p : " + counter('p', n));
            System.out.println("q : " + counter('q', n));
            System.out.println("r : " + counter('r', n));
            System.out.println("s : " + counter('s', n));
            System.out.println("t : " + counter('t', n));
            System.out.println("u : " + counter('u', n));
            System.out.println("v : " + counter('v', n));
            System.out.println("w : " + counter('w', n));
            System.out.println("x : " + counter('x', n));
            System.out.println("y : " + counter('y', n));
            System.out.println("z : " + counter('z', n));
    }
    public static int counter(char c, String line){
        int sum = 0;
        for(int x = 0; x < line.length();x++){
            if(c == line.charAt(x)){
                sum++;
            }
            else if(Character.toUpperCase(c) == line.charAt(x)){
                sum++;
            }
        }
        return sum;
    }
} public class Main {
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        String n = scan.nextLine();
        while(scan.hasNext()) {
            n = n + scan.nextLine();
        }
            System.out.println("a : " + counter('a', n));
            System.out.println("b : " + counter('b', n));
            System.out.println("c : " + counter('c', n));
            System.out.println("d : " + counter('d', n));
            System.out.println("e : " + counter('e', n));
            System.out.println("f : " + counter('f', n));
            System.out.println("g : " + counter('g', n));
            System.out.println("h : " + counter('h', n));
            System.out.println("i : " + counter('i', n));
            System.out.println("j : " + counter('j', n));
            System.out.println("k : " + counter('k', n));
            System.out.println("l : " + counter('l', n));
            System.out.println("m : " + counter('m', n));
            System.out.println("n : " + counter('n', n));
            System.out.println("o : " + counter('o', n));
            System.out.println("p : " + counter('p', n));
            System.out.println("q : " + counter('q', n));
            System.out.println("r : " + counter('r', n));
            System.out.println("s : " + counter('s', n));
            System.out.println("t : " + counter('t', n));
            System.out.println("u : " + counter('u', n));
            System.out.println("v : " + counter('v', n));
            System.out.println("w : " + counter('w', n));
            System.out.println("x : " + counter('x', n));
            System.out.println("y : " + counter('y', n));
            System.out.println("z : " + counter('z', n));
    }
    public static int counter(char c, String line){
        int sum = 0;
        for(int x = 0; x < line.length();x++){
            if(c == line.charAt(x)){
                sum++;
            }
            else if(Character.toUpperCase(c) == line.charAt(x)){
                sum++;
            }
        }
        return sum;
    }
} Main
import java.util.Scanner;
public class Main {
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        String n = scan.nextLine();
        while(scan.hasNext()) {
            n = n + scan.nextLine();
        }
            System.out.println("a : " + counter('a', n));
            System.out.println("b : " + counter('b', n));
            System.out.println("c : " + counter('c', n));
            System.out.println("d : " + counter('d', n));
            System.out.println("e : " + counter('e', n));
            System.out.println("f : " + counter('f', n));
            System.out.println("g : " + counter('g', n));
            System.out.println("h : " + counter('h', n));
            System.out.println("i : " + counter('i', n));
            System.out.println("j : " + counter('j', n));
            System.out.println("k : " + counter('k', n));
            System.out.println("l : " + counter('l', n));
            System.out.println("m : " + counter('m', n));
            System.out.println("n : " + counter('n', n));
            System.out.println("o : " + counter('o', n));
            System.out.println("p : " + counter('p', n));
            System.out.println("q : " + counter('q', n));
            System.out.println("r : " + counter('r', n));
            System.out.println("s : " + counter('s', n));
            System.out.println("t : " + counter('t', n));
            System.out.println("u : " + counter('u', n));
            System.out.println("v : " + counter('v', n));
            System.out.println("w : " + counter('w', n));
            System.out.println("x : " + counter('x', n));
            System.out.println("y : " + counter('y', n));
            System.out.println("z : " + counter('z', n));
    }
    public static int counter(char c, String line){
        int sum = 0;
        for(int x = 0; x < line.length();x++){
            if(c == line.charAt(x)){
                sum++;
            }
            else if(Character.toUpperCase(c) == line.charAt(x)){
                sum++;
            }
        }
        return sum;
    }
}
