import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();

        while(sc.hasNextLine()){
            sb.append(sc.nextLine().toLowerCase());
        }

        char now;
        char a = 'a';
        int[] data = new int[26];
        String line = sb.toString();

        for(int i = 0; i < line.length(); i++){
            now = line.charAt(i);
            for(int j = 0; j < 26; j++){
                if(now == (char)(a+j)){
                    data[j]++;
                    break;
                }
            }
        }

        for(int i = 0; i < 26; i++){
            System.out.println((char)(a+i) + " : " + data[i]);
        }
    }
} import java.util.Scanner; Scanner java.util public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();

        while(sc.hasNextLine()){
            sb.append(sc.nextLine().toLowerCase());
        }

        char now;
        char a = 'a';
        int[] data = new int[26];
        String line = sb.toString();

        for(int i = 0; i < line.length(); i++){
            now = line.charAt(i);
            for(int j = 0; j < 26; j++){
                if(now == (char)(a+j)){
                    data[j]++;
                    break;
                }
            }
        }

        for(int i = 0; i < 26; i++){
            System.out.println((char)(a+i) + " : " + data[i]);
        }
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();

        while(sc.hasNextLine()){
            sb.append(sc.nextLine().toLowerCase());
        }

        char now;
        char a = 'a';
        int[] data = new int[26];
        String line = sb.toString();

        for(int i = 0; i < line.length(); i++){
            now = line.charAt(i);
            for(int j = 0; j < 26; j++){
                if(now == (char)(a+j)){
                    data[j]++;
                    break;
                }
            }
        }

        for(int i = 0; i < 26; i++){
            System.out.println((char)(a+i) + " : " + data[i]);
        }
    } main {
        Scanner sc = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();

        while(sc.hasNextLine()){
            sb.append(sc.nextLine().toLowerCase());
        }

        char now;
        char a = 'a';
        int[] data = new int[26];
        String line = sb.toString();

        for(int i = 0; i < line.length(); i++){
            now = line.charAt(i);
            for(int j = 0; j < 26; j++){
                if(now == (char)(a+j)){
                    data[j]++;
                    break;
                }
            }
        }

        for(int i = 0; i < 26; i++){
            System.out.println((char)(a+i) + " : " + data[i]);
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) StringBuilder sb = new StringBuilder(); sb new StringBuilder() while(sc.hasNextLine()){
            sb.append(sc.nextLine().toLowerCase());
        } sc.hasNextLine() sc.hasNextLine sc {
            sb.append(sc.nextLine().toLowerCase());
        } sb.append(sc.nextLine().toLowerCase()) sb.append sb sc.nextLine().toLowerCase() sc.nextLine().toLowerCase sc.nextLine() sc.nextLine sc char now; now char a = 'a'; a 'a' int[] data = new int[26]; data new int[26] 26 String line = sb.toString(); line sb.toString() sb.toString sb for(int i = 0; i < line.length(); i++){
            now = line.charAt(i);
            for(int j = 0; j < 26; j++){
                if(now == (char)(a+j)){
                    data[j]++;
                    break;
                }
            }
        } int i = 0; int i = 0; i 0 i < line.length() i line.length() line.length line i++ i++ i {
            now = line.charAt(i);
            for(int j = 0; j < 26; j++){
                if(now == (char)(a+j)){
                    data[j]++;
                    break;
                }
            }
        } {
            now = line.charAt(i);
            for(int j = 0; j < 26; j++){
                if(now == (char)(a+j)){
                    data[j]++;
                    break;
                }
            }
        } now = line.charAt(i) now line.charAt(i) line.charAt line i for(int j = 0; j < 26; j++){
                if(now == (char)(a+j)){
                    data[j]++;
                    break;
                }
            } int j = 0; int j = 0; j 0 j < 26 j 26 j++ j++ j {
                if(now == (char)(a+j)){
                    data[j]++;
                    break;
                }
            } {
                if(now == (char)(a+j)){
                    data[j]++;
                    break;
                }
            } if(now == (char)(a+j)){
                    data[j]++;
                    break;
                } now == (char)(a+j) now (char)(a+j) a j {
                    data[j]++;
                    break;
                } data[j]++ data[j] data j break; for(int i = 0; i < 26; i++){
            System.out.println((char)(a+i) + " : " + data[i]);
        } int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
            System.out.println((char)(a+i) + " : " + data[i]);
        } {
            System.out.println((char)(a+i) + " : " + data[i]);
        } System.out.println((char)(a+i) + " : " + data[i]) System.out.println System.out System System.out (char)(a+i) + " : " + data[i] (char)(a+i) + " : " + data[i] (char)(a+i) a i " : " data[i] data i String[] args args public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();

        while(sc.hasNextLine()){
            sb.append(sc.nextLine().toLowerCase());
        }

        char now;
        char a = 'a';
        int[] data = new int[26];
        String line = sb.toString();

        for(int i = 0; i < line.length(); i++){
            now = line.charAt(i);
            for(int j = 0; j < 26; j++){
                if(now == (char)(a+j)){
                    data[j]++;
                    break;
                }
            }
        }

        for(int i = 0; i < 26; i++){
            System.out.println((char)(a+i) + " : " + data[i]);
        }
    }
} public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();

        while(sc.hasNextLine()){
            sb.append(sc.nextLine().toLowerCase());
        }

        char now;
        char a = 'a';
        int[] data = new int[26];
        String line = sb.toString();

        for(int i = 0; i < line.length(); i++){
            now = line.charAt(i);
            for(int j = 0; j < 26; j++){
                if(now == (char)(a+j)){
                    data[j]++;
                    break;
                }
            }
        }

        for(int i = 0; i < 26; i++){
            System.out.println((char)(a+i) + " : " + data[i]);
        }
    }
} Main
import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();

        while(sc.hasNextLine()){
            sb.append(sc.nextLine().toLowerCase());
        }

        char now;
        char a = 'a';
        int[] data = new int[26];
        String line = sb.toString();

        for(int i = 0; i < line.length(); i++){
            now = line.charAt(i);
            for(int j = 0; j < 26; j++){
                if(now == (char)(a+j)){
                    data[j]++;
                    break;
                }
            }
        }

        for(int i = 0; i < 26; i++){
            System.out.println((char)(a+i) + " : " + data[i]);
        }
    }
}