import java.io.*;
import java.util.Scanner;
public class Main{
	public static void main(String[] args) {
		BufferedReader br = 
				new BufferedReader(new InputStreamReader(System.in));
		Scanner scan = new Scanner(System.in);
		String str = "";
		String check="";
		int[] alph = new int[26];
		while(scan.hasNext()){
			str = scan.next();
			for(int j=0;j<str.length();j++){
				check =String.valueOf(str.charAt(j));	
				if(check.matches("[a-z]+")){
					alph[str.charAt(j)-'a']++;
				}else if(check.matches("[A-Z]+")){
					alph[str.charAt(j)-'A']++;
				}
			}
			//System.out.println(str.length());
			//System.out.println(Character.isLetterOrDigit(str.charAt(0)));
		}
		for(int i=97;i<123;i++)
			System.out.println((char)i+" : "+alph[i-97]);
	}
} import java.io.*; io.* java import java.util.Scanner; Scanner java.util public class Main{
	public static void main(String[] args) {
		BufferedReader br = 
				new BufferedReader(new InputStreamReader(System.in));
		Scanner scan = new Scanner(System.in);
		String str = "";
		String check="";
		int[] alph = new int[26];
		while(scan.hasNext()){
			str = scan.next();
			for(int j=0;j<str.length();j++){
				check =String.valueOf(str.charAt(j));	
				if(check.matches("[a-z]+")){
					alph[str.charAt(j)-'a']++;
				}else if(check.matches("[A-Z]+")){
					alph[str.charAt(j)-'A']++;
				}
			}
			//System.out.println(str.length());
			//System.out.println(Character.isLetterOrDigit(str.charAt(0)));
		}
		for(int i=97;i<123;i++)
			System.out.println((char)i+" : "+alph[i-97]);
	}
} Main public static void main(String[] args) {
		BufferedReader br = 
				new BufferedReader(new InputStreamReader(System.in));
		Scanner scan = new Scanner(System.in);
		String str = "";
		String check="";
		int[] alph = new int[26];
		while(scan.hasNext()){
			str = scan.next();
			for(int j=0;j<str.length();j++){
				check =String.valueOf(str.charAt(j));	
				if(check.matches("[a-z]+")){
					alph[str.charAt(j)-'a']++;
				}else if(check.matches("[A-Z]+")){
					alph[str.charAt(j)-'A']++;
				}
			}
			//System.out.println(str.length());
			//System.out.println(Character.isLetterOrDigit(str.charAt(0)));
		}
		for(int i=97;i<123;i++)
			System.out.println((char)i+" : "+alph[i-97]);
	} main {
		BufferedReader br = 
				new BufferedReader(new InputStreamReader(System.in));
		Scanner scan = new Scanner(System.in);
		String str = "";
		String check="";
		int[] alph = new int[26];
		while(scan.hasNext()){
			str = scan.next();
			for(int j=0;j<str.length();j++){
				check =String.valueOf(str.charAt(j));	
				if(check.matches("[a-z]+")){
					alph[str.charAt(j)-'a']++;
				}else if(check.matches("[A-Z]+")){
					alph[str.charAt(j)-'A']++;
				}
			}
			//System.out.println(str.length());
			//System.out.println(Character.isLetterOrDigit(str.charAt(0)));
		}
		for(int i=97;i<123;i++)
			System.out.println((char)i+" : "+alph[i-97]);
	} BufferedReader br = 
				new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) Scanner scan = new Scanner(System.in); scan new Scanner(System.in) String str = ""; str "" String check=""; check "" int[] alph = new int[26]; alph new int[26] 26 while(scan.hasNext()){
			str = scan.next();
			for(int j=0;j<str.length();j++){
				check =String.valueOf(str.charAt(j));	
				if(check.matches("[a-z]+")){
					alph[str.charAt(j)-'a']++;
				}else if(check.matches("[A-Z]+")){
					alph[str.charAt(j)-'A']++;
				}
			}
			//System.out.println(str.length());
			//System.out.println(Character.isLetterOrDigit(str.charAt(0)));
		} scan.hasNext() scan.hasNext scan {
			str = scan.next();
			for(int j=0;j<str.length();j++){
				check =String.valueOf(str.charAt(j));	
				if(check.matches("[a-z]+")){
					alph[str.charAt(j)-'a']++;
				}else if(check.matches("[A-Z]+")){
					alph[str.charAt(j)-'A']++;
				}
			}
			//System.out.println(str.length());
			//System.out.println(Character.isLetterOrDigit(str.charAt(0)));
		} str = scan.next() str scan.next() scan.next scan for(int j=0;j<str.length();j++){
				check =String.valueOf(str.charAt(j));	
				if(check.matches("[a-z]+")){
					alph[str.charAt(j)-'a']++;
				}else if(check.matches("[A-Z]+")){
					alph[str.charAt(j)-'A']++;
				}
			} int j=0; int j=0; j 0 j<str.length() j str.length() str.length str j++ j++ j {
				check =String.valueOf(str.charAt(j));	
				if(check.matches("[a-z]+")){
					alph[str.charAt(j)-'a']++;
				}else if(check.matches("[A-Z]+")){
					alph[str.charAt(j)-'A']++;
				}
			} {
				check =String.valueOf(str.charAt(j));	
				if(check.matches("[a-z]+")){
					alph[str.charAt(j)-'a']++;
				}else if(check.matches("[A-Z]+")){
					alph[str.charAt(j)-'A']++;
				}
			} check =String.valueOf(str.charAt(j)) check String.valueOf(str.charAt(j)) String.valueOf String str.charAt(j) str.charAt str j if(check.matches("[a-z]+")){
					alph[str.charAt(j)-'a']++;
				}else if(check.matches("[A-Z]+")){
					alph[str.charAt(j)-'A']++;
				} check.matches("[a-z]+") check.matches check "[a-z]+" {
					alph[str.charAt(j)-'a']++;
				} alph[str.charAt(j)-'a']++ alph[str.charAt(j)-'a'] alph str.charAt(j)-'a' str.charAt(j) str.charAt str j 'a' if(check.matches("[A-Z]+")){
					alph[str.charAt(j)-'A']++;
				} check.matches("[A-Z]+") check.matches check "[A-Z]+" {
					alph[str.charAt(j)-'A']++;
				} alph[str.charAt(j)-'A']++ alph[str.charAt(j)-'A'] alph str.charAt(j)-'A' str.charAt(j) str.charAt str j 'A' for(int i=97;i<123;i++)
			System.out.println((char)i+" : "+alph[i-97]); int i=97; int i=97; i 97 i<123 i 123 i++ i++ i System.out.println((char)i+" : "+alph[i-97]); System.out.println((char)i+" : "+alph[i-97]) System.out.println System.out System System.out (char)i+" : "+alph[i-97] (char)i+" : "+alph[i-97] (char)i " : " alph[i-97] alph i-97 i 97 String[] args args public class Main{
	public static void main(String[] args) {
		BufferedReader br = 
				new BufferedReader(new InputStreamReader(System.in));
		Scanner scan = new Scanner(System.in);
		String str = "";
		String check="";
		int[] alph = new int[26];
		while(scan.hasNext()){
			str = scan.next();
			for(int j=0;j<str.length();j++){
				check =String.valueOf(str.charAt(j));	
				if(check.matches("[a-z]+")){
					alph[str.charAt(j)-'a']++;
				}else if(check.matches("[A-Z]+")){
					alph[str.charAt(j)-'A']++;
				}
			}
			//System.out.println(str.length());
			//System.out.println(Character.isLetterOrDigit(str.charAt(0)));
		}
		for(int i=97;i<123;i++)
			System.out.println((char)i+" : "+alph[i-97]);
	}
} public class Main{
	public static void main(String[] args) {
		BufferedReader br = 
				new BufferedReader(new InputStreamReader(System.in));
		Scanner scan = new Scanner(System.in);
		String str = "";
		String check="";
		int[] alph = new int[26];
		while(scan.hasNext()){
			str = scan.next();
			for(int j=0;j<str.length();j++){
				check =String.valueOf(str.charAt(j));	
				if(check.matches("[a-z]+")){
					alph[str.charAt(j)-'a']++;
				}else if(check.matches("[A-Z]+")){
					alph[str.charAt(j)-'A']++;
				}
			}
			//System.out.println(str.length());
			//System.out.println(Character.isLetterOrDigit(str.charAt(0)));
		}
		for(int i=97;i<123;i++)
			System.out.println((char)i+" : "+alph[i-97]);
	}
} Main
import java.io.*;
import java.util.Scanner;
public class Main{
	public static void main(String[] args) {
		BufferedReader br = 
				new BufferedReader(new InputStreamReader(System.in));
		Scanner scan = new Scanner(System.in);
		String str = "";
		String check="";
		int[] alph = new int[26];
		while(scan.hasNext()){
			str = scan.next();
			for(int j=0;j<str.length();j++){
				check =String.valueOf(str.charAt(j));	
				if(check.matches("[a-z]+")){
					alph[str.charAt(j)-'a']++;
				}else if(check.matches("[A-Z]+")){
					alph[str.charAt(j)-'A']++;
				}
			}
			//System.out.println(str.length());
			//System.out.println(Character.isLetterOrDigit(str.charAt(0)));
		}
		for(int i=97;i<123;i++)
			System.out.println((char)i+" : "+alph[i-97]);
	}
}