import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        
        int[] count=new int['z'];
        for(int i:count){
            i=0;
        }
       while(sc.hasNext()){
           
           String s=sc.next();
           s=s.toLowerCase();
           char[] c=s.toCharArray();
           
           
           for(char a:c){
               
              count[a-1]++;
           }
       }
        
    for(int i='a';i<='z';i++){
        
        System.out.println((char) i+" : "+count[i-1]);
    }
        
       
        
       
    }
}
 import java.util.*; util.* java public class Main {
    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        
        int[] count=new int['z'];
        for(int i:count){
            i=0;
        }
       while(sc.hasNext()){
           
           String s=sc.next();
           s=s.toLowerCase();
           char[] c=s.toCharArray();
           
           
           for(char a:c){
               
              count[a-1]++;
           }
       }
        
    for(int i='a';i<='z';i++){
        
        System.out.println((char) i+" : "+count[i-1]);
    }
        
       
        
       
    }
} Main public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        
        int[] count=new int['z'];
        for(int i:count){
            i=0;
        }
       while(sc.hasNext()){
           
           String s=sc.next();
           s=s.toLowerCase();
           char[] c=s.toCharArray();
           
           
           for(char a:c){
               
              count[a-1]++;
           }
       }
        
    for(int i='a';i<='z';i++){
        
        System.out.println((char) i+" : "+count[i-1]);
    }
        
       
        
       
    } main {
        Scanner sc= new Scanner(System.in);
        
        int[] count=new int['z'];
        for(int i:count){
            i=0;
        }
       while(sc.hasNext()){
           
           String s=sc.next();
           s=s.toLowerCase();
           char[] c=s.toCharArray();
           
           
           for(char a:c){
               
              count[a-1]++;
           }
       }
        
    for(int i='a';i<='z';i++){
        
        System.out.println((char) i+" : "+count[i-1]);
    }
        
       
        
       
    } Scanner sc= new Scanner(System.in); sc new Scanner(System.in) int[] count=new int['z']; count new int['z'] 'z' for(int i:count){
            i=0;
        } int i count {
            i=0;
        } {
            i=0;
        } i=0 i 0 while(sc.hasNext()){
           
           String s=sc.next();
           s=s.toLowerCase();
           char[] c=s.toCharArray();
           
           
           for(char a:c){
               
              count[a-1]++;
           }
       } sc.hasNext() sc.hasNext sc {
           
           String s=sc.next();
           s=s.toLowerCase();
           char[] c=s.toCharArray();
           
           
           for(char a:c){
               
              count[a-1]++;
           }
       } String s=sc.next(); s sc.next() sc.next sc s=s.toLowerCase() s s.toLowerCase() s.toLowerCase s char[] c=s.toCharArray(); c s.toCharArray() s.toCharArray s for(char a:c){
               
              count[a-1]++;
           } char a c {
               
              count[a-1]++;
           } {
               
              count[a-1]++;
           } count[a-1]++ count[a-1] count a-1 a 1 for(int i='a';i<='z';i++){
        
        System.out.println((char) i+" : "+count[i-1]);
    } int i='a'; int i='a'; i 'a' i<='z' i 'z' i++ i++ i {
        
        System.out.println((char) i+" : "+count[i-1]);
    } {
        
        System.out.println((char) i+" : "+count[i-1]);
    } System.out.println((char) i+" : "+count[i-1]) System.out.println System.out System System.out (char) i+" : "+count[i-1] (char) i+" : "+count[i-1] (char) i " : " count[i-1] count i-1 i 1 String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        
        int[] count=new int['z'];
        for(int i:count){
            i=0;
        }
       while(sc.hasNext()){
           
           String s=sc.next();
           s=s.toLowerCase();
           char[] c=s.toCharArray();
           
           
           for(char a:c){
               
              count[a-1]++;
           }
       }
        
    for(int i='a';i<='z';i++){
        
        System.out.println((char) i+" : "+count[i-1]);
    }
        
       
        
       
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        
        int[] count=new int['z'];
        for(int i:count){
            i=0;
        }
       while(sc.hasNext()){
           
           String s=sc.next();
           s=s.toLowerCase();
           char[] c=s.toCharArray();
           
           
           for(char a:c){
               
              count[a-1]++;
           }
       }
        
    for(int i='a';i<='z';i++){
        
        System.out.println((char) i+" : "+count[i-1]);
    }
        
       
        
       
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        
        int[] count=new int['z'];
        for(int i:count){
            i=0;
        }
       while(sc.hasNext()){
           
           String s=sc.next();
           s=s.toLowerCase();
           char[] c=s.toCharArray();
           
           
           for(char a:c){
               
              count[a-1]++;
           }
       }
        
    for(int i='a';i<='z';i++){
        
        System.out.println((char) i+" : "+count[i-1]);
    }
        
       
        
       
    }
}

