import java.util.Scanner;
 
class Main {
    Scanner sc = new Scanner(System.in);
 
    int[] count = new int[26];
 
    public void run() {
        while(sc.hasNext()){
            String str = sc.nextLine();
            str=str.toLowerCase();
            char[] c = str.toCharArray();
            for (int i = 0; i < c.length; i++) {
                if ('a' <= c[i] && c[i] <= 'z')
                    count[c[i] - 'a']++;
            }
        }
        for (int i = 0; i < count.length; i++) {
            ln(((char) (i + 'a')) + " : " + count[i]);
        }
    }
 
    public static void main(String[] args) {
        new Main().run();
    }
 
    public static void pr(Object o) {
        System.out.print(o);
    }
 
    public static void ln(Object o) {
        System.out.println(o);
    }
 
    public static void ln() {
        System.out.println();
    }
} import java.util.Scanner; Scanner java.util class Main {
    Scanner sc = new Scanner(System.in);
 
    int[] count = new int[26];
 
    public void run() {
        while(sc.hasNext()){
            String str = sc.nextLine();
            str=str.toLowerCase();
            char[] c = str.toCharArray();
            for (int i = 0; i < c.length; i++) {
                if ('a' <= c[i] && c[i] <= 'z')
                    count[c[i] - 'a']++;
            }
        }
        for (int i = 0; i < count.length; i++) {
            ln(((char) (i + 'a')) + " : " + count[i]);
        }
    }
 
    public static void main(String[] args) {
        new Main().run();
    }
 
    public static void pr(Object o) {
        System.out.print(o);
    }
 
    public static void ln(Object o) {
        System.out.println(o);
    }
 
    public static void ln() {
        System.out.println();
    }
} Main Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] count = new int[26]; count new int[26] 26 public void run() {
        while(sc.hasNext()){
            String str = sc.nextLine();
            str=str.toLowerCase();
            char[] c = str.toCharArray();
            for (int i = 0; i < c.length; i++) {
                if ('a' <= c[i] && c[i] <= 'z')
                    count[c[i] - 'a']++;
            }
        }
        for (int i = 0; i < count.length; i++) {
            ln(((char) (i + 'a')) + " : " + count[i]);
        }
    } run {
        while(sc.hasNext()){
            String str = sc.nextLine();
            str=str.toLowerCase();
            char[] c = str.toCharArray();
            for (int i = 0; i < c.length; i++) {
                if ('a' <= c[i] && c[i] <= 'z')
                    count[c[i] - 'a']++;
            }
        }
        for (int i = 0; i < count.length; i++) {
            ln(((char) (i + 'a')) + " : " + count[i]);
        }
    } while(sc.hasNext()){
            String str = sc.nextLine();
            str=str.toLowerCase();
            char[] c = str.toCharArray();
            for (int i = 0; i < c.length; i++) {
                if ('a' <= c[i] && c[i] <= 'z')
                    count[c[i] - 'a']++;
            }
        } sc.hasNext() sc.hasNext sc {
            String str = sc.nextLine();
            str=str.toLowerCase();
            char[] c = str.toCharArray();
            for (int i = 0; i < c.length; i++) {
                if ('a' <= c[i] && c[i] <= 'z')
                    count[c[i] - 'a']++;
            }
        } String str = sc.nextLine(); str sc.nextLine() sc.nextLine sc str=str.toLowerCase() str str.toLowerCase() str.toLowerCase str char[] c = str.toCharArray(); c str.toCharArray() str.toCharArray str for (int i = 0; i < c.length; i++) {
                if ('a' <= c[i] && c[i] <= 'z')
                    count[c[i] - 'a']++;
            } int i = 0; int i = 0; i 0 i < c.length i c.length c c.length i++ i++ i {
                if ('a' <= c[i] && c[i] <= 'z')
                    count[c[i] - 'a']++;
            } {
                if ('a' <= c[i] && c[i] <= 'z')
                    count[c[i] - 'a']++;
            } if ('a' <= c[i] && c[i] <= 'z')
                    count[c[i] - 'a']++; 'a' <= c[i] && c[i] <= 'z' 'a' <= c[i] 'a' c[i] c i c[i] <= 'z' c[i] c i 'z' count[c[i] - 'a']++ count[c[i] - 'a'] count c[i] - 'a' c[i] c i 'a' for (int i = 0; i < count.length; i++) {
            ln(((char) (i + 'a')) + " : " + count[i]);
        } int i = 0; int i = 0; i 0 i < count.length i count.length count count.length i++ i++ i {
            ln(((char) (i + 'a')) + " : " + count[i]);
        } {
            ln(((char) (i + 'a')) + " : " + count[i]);
        } ln(((char) (i + 'a')) + " : " + count[i]) ln ((char) (i + 'a')) + " : " + count[i] ((char) (i + 'a')) + " : " + count[i] ((char) (i + 'a')) i 'a' " : " count[i] count i public static void main(String[] args) {
        new Main().run();
    } main {
        new Main().run();
    } new Main().run() new Main().run new Main() String[] args args public static void pr(Object o) {
        System.out.print(o);
    } pr {
        System.out.print(o);
    } System.out.print(o) System.out.print System.out System System.out o Object o o public static void ln(Object o) {
        System.out.println(o);
    } ln {
        System.out.println(o);
    } System.out.println(o) System.out.println System.out System System.out o Object o o public static void ln() {
        System.out.println();
    } ln {
        System.out.println();
    } System.out.println() System.out.println System.out System System.out
import java.util.Scanner;
 
class Main {
    Scanner sc = new Scanner(System.in);
 
    int[] count = new int[26];
 
    public void run() {
        while(sc.hasNext()){
            String str = sc.nextLine();
            str=str.toLowerCase();
            char[] c = str.toCharArray();
            for (int i = 0; i < c.length; i++) {
                if ('a' <= c[i] && c[i] <= 'z')
                    count[c[i] - 'a']++;
            }
        }
        for (int i = 0; i < count.length; i++) {
            ln(((char) (i + 'a')) + " : " + count[i]);
        }
    }
 
    public static void main(String[] args) {
        new Main().run();
    }
 
    public static void pr(Object o) {
        System.out.print(o);
    }
 
    public static void ln(Object o) {
        System.out.println(o);
    }
 
    public static void ln() {
        System.out.println();
    }
}
