import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int result[] = new int[26];
        for(int i = 0 ; i < 26 ; i++)
            result[i] = 0;
        while(sc.hasNext())
        {
            String str = sc.next();
            str = str.toLowerCase();
            for(int i = 0 ; i < str.length() ; i++)
            {
                char c = str.charAt(i);
                if(c >= 'a' && c <= 'z')
                    result[c - 'a']++;
            }
        }
        for(char ch = 'a' ; ch <= 'z' ; ch++)
        {
            System.out.println(ch + " : " + result[ch - 'a']);
        }
    }
} import java.util.Scanner; Scanner java.util public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int result[] = new int[26];
        for(int i = 0 ; i < 26 ; i++)
            result[i] = 0;
        while(sc.hasNext())
        {
            String str = sc.next();
            str = str.toLowerCase();
            for(int i = 0 ; i < str.length() ; i++)
            {
                char c = str.charAt(i);
                if(c >= 'a' && c <= 'z')
                    result[c - 'a']++;
            }
        }
        for(char ch = 'a' ; ch <= 'z' ; ch++)
        {
            System.out.println(ch + " : " + result[ch - 'a']);
        }
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int result[] = new int[26];
        for(int i = 0 ; i < 26 ; i++)
            result[i] = 0;
        while(sc.hasNext())
        {
            String str = sc.next();
            str = str.toLowerCase();
            for(int i = 0 ; i < str.length() ; i++)
            {
                char c = str.charAt(i);
                if(c >= 'a' && c <= 'z')
                    result[c - 'a']++;
            }
        }
        for(char ch = 'a' ; ch <= 'z' ; ch++)
        {
            System.out.println(ch + " : " + result[ch - 'a']);
        }
    } main {
        Scanner sc = new Scanner(System.in);
        int result[] = new int[26];
        for(int i = 0 ; i < 26 ; i++)
            result[i] = 0;
        while(sc.hasNext())
        {
            String str = sc.next();
            str = str.toLowerCase();
            for(int i = 0 ; i < str.length() ; i++)
            {
                char c = str.charAt(i);
                if(c >= 'a' && c <= 'z')
                    result[c - 'a']++;
            }
        }
        for(char ch = 'a' ; ch <= 'z' ; ch++)
        {
            System.out.println(ch + " : " + result[ch - 'a']);
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int result[] = new int[26]; result new int[26] 26 for(int i = 0 ; i < 26 ; i++)
            result[i] = 0; int i = 0 ; int i = 0 ; i 0 i < 26 i 26 i++ i++ i result[i] = 0; result[i] = 0 result[i] result i 0 while(sc.hasNext())
        {
            String str = sc.next();
            str = str.toLowerCase();
            for(int i = 0 ; i < str.length() ; i++)
            {
                char c = str.charAt(i);
                if(c >= 'a' && c <= 'z')
                    result[c - 'a']++;
            }
        } sc.hasNext() sc.hasNext sc {
            String str = sc.next();
            str = str.toLowerCase();
            for(int i = 0 ; i < str.length() ; i++)
            {
                char c = str.charAt(i);
                if(c >= 'a' && c <= 'z')
                    result[c - 'a']++;
            }
        } String str = sc.next(); str sc.next() sc.next sc str = str.toLowerCase() str str.toLowerCase() str.toLowerCase str for(int i = 0 ; i < str.length() ; i++)
            {
                char c = str.charAt(i);
                if(c >= 'a' && c <= 'z')
                    result[c - 'a']++;
            } int i = 0 ; int i = 0 ; i 0 i < str.length() i str.length() str.length str i++ i++ i {
                char c = str.charAt(i);
                if(c >= 'a' && c <= 'z')
                    result[c - 'a']++;
            } {
                char c = str.charAt(i);
                if(c >= 'a' && c <= 'z')
                    result[c - 'a']++;
            } char c = str.charAt(i); c str.charAt(i) str.charAt str i if(c >= 'a' && c <= 'z')
                    result[c - 'a']++; c >= 'a' && c <= 'z' c >= 'a' c 'a' c <= 'z' c 'z' result[c - 'a']++ result[c - 'a'] result c - 'a' c 'a' for(char ch = 'a' ; ch <= 'z' ; ch++)
        {
            System.out.println(ch + " : " + result[ch - 'a']);
        } char ch = 'a' ; char ch = 'a' ; ch 'a' ch <= 'z' ch 'z' ch++ ch++ ch {
            System.out.println(ch + " : " + result[ch - 'a']);
        } {
            System.out.println(ch + " : " + result[ch - 'a']);
        } System.out.println(ch + " : " + result[ch - 'a']) System.out.println System.out System System.out ch + " : " + result[ch - 'a'] ch + " : " + result[ch - 'a'] ch " : " result[ch - 'a'] result ch - 'a' ch 'a' String[] args args public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int result[] = new int[26];
        for(int i = 0 ; i < 26 ; i++)
            result[i] = 0;
        while(sc.hasNext())
        {
            String str = sc.next();
            str = str.toLowerCase();
            for(int i = 0 ; i < str.length() ; i++)
            {
                char c = str.charAt(i);
                if(c >= 'a' && c <= 'z')
                    result[c - 'a']++;
            }
        }
        for(char ch = 'a' ; ch <= 'z' ; ch++)
        {
            System.out.println(ch + " : " + result[ch - 'a']);
        }
    }
} public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int result[] = new int[26];
        for(int i = 0 ; i < 26 ; i++)
            result[i] = 0;
        while(sc.hasNext())
        {
            String str = sc.next();
            str = str.toLowerCase();
            for(int i = 0 ; i < str.length() ; i++)
            {
                char c = str.charAt(i);
                if(c >= 'a' && c <= 'z')
                    result[c - 'a']++;
            }
        }
        for(char ch = 'a' ; ch <= 'z' ; ch++)
        {
            System.out.println(ch + " : " + result[ch - 'a']);
        }
    }
} Main
import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int result[] = new int[26];
        for(int i = 0 ; i < 26 ; i++)
            result[i] = 0;
        while(sc.hasNext())
        {
            String str = sc.next();
            str = str.toLowerCase();
            for(int i = 0 ; i < str.length() ; i++)
            {
                char c = str.charAt(i);
                if(c >= 'a' && c <= 'z')
                    result[c - 'a']++;
            }
        }
        for(char ch = 'a' ; ch <= 'z' ; ch++)
        {
            System.out.println(ch + " : " + result[ch - 'a']);
        }
    }
}
