import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner scan=new Scanner(System.in);
		int[] a=new int[26];
		while(scan.hasNext()){
		
			String str = scan.nextLine();
			str = str.toLowerCase();
		
			for(int i=0;i<str.length();i++)
				if(str.charAt(i) >= 'a' && str.charAt(i) <= 'z')
					a[str.charAt(i)-'a']++;
		}
		
		for(int i=0;i<26;i++)
			System.out.printf("%c : %d\n",i+'a',a[i]);
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args){
		Scanner scan=new Scanner(System.in);
		int[] a=new int[26];
		while(scan.hasNext()){
		
			String str = scan.nextLine();
			str = str.toLowerCase();
		
			for(int i=0;i<str.length();i++)
				if(str.charAt(i) >= 'a' && str.charAt(i) <= 'z')
					a[str.charAt(i)-'a']++;
		}
		
		for(int i=0;i<26;i++)
			System.out.printf("%c : %d\n",i+'a',a[i]);
	}
} Main public static void main(String[] args){
		Scanner scan=new Scanner(System.in);
		int[] a=new int[26];
		while(scan.hasNext()){
		
			String str = scan.nextLine();
			str = str.toLowerCase();
		
			for(int i=0;i<str.length();i++)
				if(str.charAt(i) >= 'a' && str.charAt(i) <= 'z')
					a[str.charAt(i)-'a']++;
		}
		
		for(int i=0;i<26;i++)
			System.out.printf("%c : %d\n",i+'a',a[i]);
	} main {
		Scanner scan=new Scanner(System.in);
		int[] a=new int[26];
		while(scan.hasNext()){
		
			String str = scan.nextLine();
			str = str.toLowerCase();
		
			for(int i=0;i<str.length();i++)
				if(str.charAt(i) >= 'a' && str.charAt(i) <= 'z')
					a[str.charAt(i)-'a']++;
		}
		
		for(int i=0;i<26;i++)
			System.out.printf("%c : %d\n",i+'a',a[i]);
	} Scanner scan=new Scanner(System.in); scan new Scanner(System.in) int[] a=new int[26]; a new int[26] 26 while(scan.hasNext()){
		
			String str = scan.nextLine();
			str = str.toLowerCase();
		
			for(int i=0;i<str.length();i++)
				if(str.charAt(i) >= 'a' && str.charAt(i) <= 'z')
					a[str.charAt(i)-'a']++;
		} scan.hasNext() scan.hasNext scan {
		
			String str = scan.nextLine();
			str = str.toLowerCase();
		
			for(int i=0;i<str.length();i++)
				if(str.charAt(i) >= 'a' && str.charAt(i) <= 'z')
					a[str.charAt(i)-'a']++;
		} String str = scan.nextLine(); str scan.nextLine() scan.nextLine scan str = str.toLowerCase() str str.toLowerCase() str.toLowerCase str for(int i=0;i<str.length();i++)
				if(str.charAt(i) >= 'a' && str.charAt(i) <= 'z')
					a[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(str.charAt(i) >= 'a' && str.charAt(i) <= 'z')
					a[str.charAt(i)-'a']++; if(str.charAt(i) >= 'a' && str.charAt(i) <= 'z')
					a[str.charAt(i)-'a']++; str.charAt(i) >= 'a' && str.charAt(i) <= 'z' str.charAt(i) >= 'a' str.charAt(i) str.charAt str i 'a' str.charAt(i) <= 'z' str.charAt(i) str.charAt str i 'z' a[str.charAt(i)-'a']++ a[str.charAt(i)-'a'] a str.charAt(i)-'a' str.charAt(i) str.charAt str i 'a' for(int i=0;i<26;i++)
			System.out.printf("%c : %d\n",i+'a',a[i]); int i=0; int i=0; i 0 i<26 i 26 i++ i++ i System.out.printf("%c : %d\n",i+'a',a[i]); System.out.printf("%c : %d\n",i+'a',a[i]) System.out.printf System.out System System.out "%c : %d\n" i+'a' i 'a' a[i] a i String[] args args public class Main {
	public static void main(String[] args){
		Scanner scan=new Scanner(System.in);
		int[] a=new int[26];
		while(scan.hasNext()){
		
			String str = scan.nextLine();
			str = str.toLowerCase();
		
			for(int i=0;i<str.length();i++)
				if(str.charAt(i) >= 'a' && str.charAt(i) <= 'z')
					a[str.charAt(i)-'a']++;
		}
		
		for(int i=0;i<26;i++)
			System.out.printf("%c : %d\n",i+'a',a[i]);
	}
} public class Main {
	public static void main(String[] args){
		Scanner scan=new Scanner(System.in);
		int[] a=new int[26];
		while(scan.hasNext()){
		
			String str = scan.nextLine();
			str = str.toLowerCase();
		
			for(int i=0;i<str.length();i++)
				if(str.charAt(i) >= 'a' && str.charAt(i) <= 'z')
					a[str.charAt(i)-'a']++;
		}
		
		for(int i=0;i<26;i++)
			System.out.printf("%c : %d\n",i+'a',a[i]);
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner scan=new Scanner(System.in);
		int[] a=new int[26];
		while(scan.hasNext()){
		
			String str = scan.nextLine();
			str = str.toLowerCase();
		
			for(int i=0;i<str.length();i++)
				if(str.charAt(i) >= 'a' && str.charAt(i) <= 'z')
					a[str.charAt(i)-'a']++;
		}
		
		for(int i=0;i<26;i++)
			System.out.printf("%c : %d\n",i+'a',a[i]);
	}
}
