import java.util.*;
public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		String str;
		int[] alpha=new int[26];
		while(sc.hasNext()){
			str=sc.nextLine();
			for(int i=0;i<str.length();i++){
				int ind=Character.getNumericValue(str.charAt(i))-10;
				if(0<=ind&&ind<26){
					alpha[Character.getNumericValue(str.charAt(i))-10]++;
				}
			}
		}
		for(int i=0;i<26;i++){
			System.out.println((char)(i+97)+" : "+alpha[i]);
		}
	}
} import java.util.*; util.* java public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		String str;
		int[] alpha=new int[26];
		while(sc.hasNext()){
			str=sc.nextLine();
			for(int i=0;i<str.length();i++){
				int ind=Character.getNumericValue(str.charAt(i))-10;
				if(0<=ind&&ind<26){
					alpha[Character.getNumericValue(str.charAt(i))-10]++;
				}
			}
		}
		for(int i=0;i<26;i++){
			System.out.println((char)(i+97)+" : "+alpha[i]);
		}
	}
} Main public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		String str;
		int[] alpha=new int[26];
		while(sc.hasNext()){
			str=sc.nextLine();
			for(int i=0;i<str.length();i++){
				int ind=Character.getNumericValue(str.charAt(i))-10;
				if(0<=ind&&ind<26){
					alpha[Character.getNumericValue(str.charAt(i))-10]++;
				}
			}
		}
		for(int i=0;i<26;i++){
			System.out.println((char)(i+97)+" : "+alpha[i]);
		}
	} main {
		Scanner sc=new Scanner(System.in);
		String str;
		int[] alpha=new int[26];
		while(sc.hasNext()){
			str=sc.nextLine();
			for(int i=0;i<str.length();i++){
				int ind=Character.getNumericValue(str.charAt(i))-10;
				if(0<=ind&&ind<26){
					alpha[Character.getNumericValue(str.charAt(i))-10]++;
				}
			}
		}
		for(int i=0;i<26;i++){
			System.out.println((char)(i+97)+" : "+alpha[i]);
		}
	} Scanner sc=new Scanner(System.in); sc new Scanner(System.in) String str; str int[] alpha=new int[26]; alpha new int[26] 26 while(sc.hasNext()){
			str=sc.nextLine();
			for(int i=0;i<str.length();i++){
				int ind=Character.getNumericValue(str.charAt(i))-10;
				if(0<=ind&&ind<26){
					alpha[Character.getNumericValue(str.charAt(i))-10]++;
				}
			}
		} sc.hasNext() sc.hasNext sc {
			str=sc.nextLine();
			for(int i=0;i<str.length();i++){
				int ind=Character.getNumericValue(str.charAt(i))-10;
				if(0<=ind&&ind<26){
					alpha[Character.getNumericValue(str.charAt(i))-10]++;
				}
			}
		} str=sc.nextLine() str sc.nextLine() sc.nextLine sc for(int i=0;i<str.length();i++){
				int ind=Character.getNumericValue(str.charAt(i))-10;
				if(0<=ind&&ind<26){
					alpha[Character.getNumericValue(str.charAt(i))-10]++;
				}
			} int i=0; int i=0; i 0 i<str.length() i str.length() str.length str i++ i++ i {
				int ind=Character.getNumericValue(str.charAt(i))-10;
				if(0<=ind&&ind<26){
					alpha[Character.getNumericValue(str.charAt(i))-10]++;
				}
			} {
				int ind=Character.getNumericValue(str.charAt(i))-10;
				if(0<=ind&&ind<26){
					alpha[Character.getNumericValue(str.charAt(i))-10]++;
				}
			} int ind=Character.getNumericValue(str.charAt(i))-10; ind Character.getNumericValue(str.charAt(i))-10 Character.getNumericValue(str.charAt(i)) Character.getNumericValue Character str.charAt(i) str.charAt str i 10 if(0<=ind&&ind<26){
					alpha[Character.getNumericValue(str.charAt(i))-10]++;
				} 0<=ind&&ind<26 0<=ind 0 ind ind<26 ind 26 {
					alpha[Character.getNumericValue(str.charAt(i))-10]++;
				} alpha[Character.getNumericValue(str.charAt(i))-10]++ alpha[Character.getNumericValue(str.charAt(i))-10] alpha Character.getNumericValue(str.charAt(i))-10 Character.getNumericValue(str.charAt(i)) Character.getNumericValue Character str.charAt(i) str.charAt str i 10 for(int i=0;i<26;i++){
			System.out.println((char)(i+97)+" : "+alpha[i]);
		} int i=0; int i=0; i 0 i<26 i 26 i++ i++ i {
			System.out.println((char)(i+97)+" : "+alpha[i]);
		} {
			System.out.println((char)(i+97)+" : "+alpha[i]);
		} System.out.println((char)(i+97)+" : "+alpha[i]) System.out.println System.out System System.out (char)(i+97)+" : "+alpha[i] (char)(i+97)+" : "+alpha[i] (char)(i+97) i 97 " : " alpha[i] alpha i String[] args args public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		String str;
		int[] alpha=new int[26];
		while(sc.hasNext()){
			str=sc.nextLine();
			for(int i=0;i<str.length();i++){
				int ind=Character.getNumericValue(str.charAt(i))-10;
				if(0<=ind&&ind<26){
					alpha[Character.getNumericValue(str.charAt(i))-10]++;
				}
			}
		}
		for(int i=0;i<26;i++){
			System.out.println((char)(i+97)+" : "+alpha[i]);
		}
	}
} public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		String str;
		int[] alpha=new int[26];
		while(sc.hasNext()){
			str=sc.nextLine();
			for(int i=0;i<str.length();i++){
				int ind=Character.getNumericValue(str.charAt(i))-10;
				if(0<=ind&&ind<26){
					alpha[Character.getNumericValue(str.charAt(i))-10]++;
				}
			}
		}
		for(int i=0;i<26;i++){
			System.out.println((char)(i+97)+" : "+alpha[i]);
		}
	}
} Main
import java.util.*;
public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		String str;
		int[] alpha=new int[26];
		while(sc.hasNext()){
			str=sc.nextLine();
			for(int i=0;i<str.length();i++){
				int ind=Character.getNumericValue(str.charAt(i))-10;
				if(0<=ind&&ind<26){
					alpha[Character.getNumericValue(str.charAt(i))-10]++;
				}
			}
		}
		for(int i=0;i<26;i++){
			System.out.println((char)(i+97)+" : "+alpha[i]);
		}
	}
}
