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