import java.io.*;

public class Main{
    public static void main(String[]args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str;
        int count[] = new int[26];
        char abc ='a';
        
        while((str=br.readLine())!=null){
          
            for(int i=0;i<str.length();i++){
                if(Character.isLetter(str.charAt(i))){
                    count[Character.toLowerCase(str.charAt(i)) - 'a']++;
                }
            }
        }
       for(int i=0;i<26;i++){
           System.out.println(abc++ + " : " +count[i]);
    }
        
        
    }

        
} import java.io.*; io.* java public class Main{
    public static void main(String[]args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str;
        int count[] = new int[26];
        char abc ='a';
        
        while((str=br.readLine())!=null){
          
            for(int i=0;i<str.length();i++){
                if(Character.isLetter(str.charAt(i))){
                    count[Character.toLowerCase(str.charAt(i)) - 'a']++;
                }
            }
        }
       for(int i=0;i<26;i++){
           System.out.println(abc++ + " : " +count[i]);
    }
        
        
    }

        
} Main public static void main(String[]args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str;
        int count[] = new int[26];
        char abc ='a';
        
        while((str=br.readLine())!=null){
          
            for(int i=0;i<str.length();i++){
                if(Character.isLetter(str.charAt(i))){
                    count[Character.toLowerCase(str.charAt(i)) - 'a']++;
                }
            }
        }
       for(int i=0;i<26;i++){
           System.out.println(abc++ + " : " +count[i]);
    }
        
        
    } main {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str;
        int count[] = new int[26];
        char abc ='a';
        
        while((str=br.readLine())!=null){
          
            for(int i=0;i<str.length();i++){
                if(Character.isLetter(str.charAt(i))){
                    count[Character.toLowerCase(str.charAt(i)) - 'a']++;
                }
            }
        }
       for(int i=0;i<26;i++){
           System.out.println(abc++ + " : " +count[i]);
    }
        
        
    } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String str; str int count[] = new int[26]; count new int[26] 26 char abc ='a'; abc 'a' while((str=br.readLine())!=null){
          
            for(int i=0;i<str.length();i++){
                if(Character.isLetter(str.charAt(i))){
                    count[Character.toLowerCase(str.charAt(i)) - 'a']++;
                }
            }
        } (str=br.readLine())!=null (str=br.readLine()) str br.readLine() br.readLine br null {
          
            for(int i=0;i<str.length();i++){
                if(Character.isLetter(str.charAt(i))){
                    count[Character.toLowerCase(str.charAt(i)) - 'a']++;
                }
            }
        } for(int i=0;i<str.length();i++){
                if(Character.isLetter(str.charAt(i))){
                    count[Character.toLowerCase(str.charAt(i)) - 'a']++;
                }
            } int i=0; int i=0; i 0 i<str.length() i str.length() str.length str i++ i++ i {
                if(Character.isLetter(str.charAt(i))){
                    count[Character.toLowerCase(str.charAt(i)) - 'a']++;
                }
            } {
                if(Character.isLetter(str.charAt(i))){
                    count[Character.toLowerCase(str.charAt(i)) - 'a']++;
                }
            } if(Character.isLetter(str.charAt(i))){
                    count[Character.toLowerCase(str.charAt(i)) - 'a']++;
                } Character.isLetter(str.charAt(i)) Character.isLetter Character str.charAt(i) str.charAt str i {
                    count[Character.toLowerCase(str.charAt(i)) - 'a']++;
                } count[Character.toLowerCase(str.charAt(i)) - 'a']++ count[Character.toLowerCase(str.charAt(i)) - 'a'] count Character.toLowerCase(str.charAt(i)) - 'a' Character.toLowerCase(str.charAt(i)) Character.toLowerCase Character str.charAt(i) str.charAt str i 'a' for(int i=0;i<26;i++){
           System.out.println(abc++ + " : " +count[i]);
    } int i=0; int i=0; i 0 i<26 i 26 i++ i++ i {
           System.out.println(abc++ + " : " +count[i]);
    } {
           System.out.println(abc++ + " : " +count[i]);
    } System.out.println(abc++ + " : " +count[i]) System.out.println System.out System System.out abc++ + " : " +count[i] abc++ + " : " +count[i] abc++ abc " : " count[i] count i String[]args args public class Main{
    public static void main(String[]args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str;
        int count[] = new int[26];
        char abc ='a';
        
        while((str=br.readLine())!=null){
          
            for(int i=0;i<str.length();i++){
                if(Character.isLetter(str.charAt(i))){
                    count[Character.toLowerCase(str.charAt(i)) - 'a']++;
                }
            }
        }
       for(int i=0;i<26;i++){
           System.out.println(abc++ + " : " +count[i]);
    }
        
        
    }

        
} public class Main{
    public static void main(String[]args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str;
        int count[] = new int[26];
        char abc ='a';
        
        while((str=br.readLine())!=null){
          
            for(int i=0;i<str.length();i++){
                if(Character.isLetter(str.charAt(i))){
                    count[Character.toLowerCase(str.charAt(i)) - 'a']++;
                }
            }
        }
       for(int i=0;i<26;i++){
           System.out.println(abc++ + " : " +count[i]);
    }
        
        
    }

        
} Main
import java.io.*;

public class Main{
    public static void main(String[]args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str;
        int count[] = new int[26];
        char abc ='a';
        
        while((str=br.readLine())!=null){
          
            for(int i=0;i<str.length();i++){
                if(Character.isLetter(str.charAt(i))){
                    count[Character.toLowerCase(str.charAt(i)) - 'a']++;
                }
            }
        }
       for(int i=0;i<26;i++){
           System.out.println(abc++ + " : " +count[i]);
    }
        
        
    }

        
}