import static java.lang.Character.*;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str;
		int[] count = new int[26];
		while((str = br.readLine()) != null){
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++){
				char c = str.charAt(i);
				if(isLetter(c)){
					count[c - 'a']++;
				}
			}
		}
		for(int i = 0;i < count.length;i++){
			System.out.print((char)('a' + i));
			System.out.print(" : ");
			System.out.println(count[i]);
		}
	}

} import static java.lang.Character.*; import static java.lang.Character.*; import static java.lang.Character.*; import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str;
		int[] count = new int[26];
		while((str = br.readLine()) != null){
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++){
				char c = str.charAt(i);
				if(isLetter(c)){
					count[c - 'a']++;
				}
			}
		}
		for(int i = 0;i < count.length;i++){
			System.out.print((char)('a' + i));
			System.out.print(" : ");
			System.out.println(count[i]);
		}
	}

} Main public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str;
		int[] count = new int[26];
		while((str = br.readLine()) != null){
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++){
				char c = str.charAt(i);
				if(isLetter(c)){
					count[c - 'a']++;
				}
			}
		}
		for(int i = 0;i < count.length;i++){
			System.out.print((char)('a' + i));
			System.out.print(" : ");
			System.out.println(count[i]);
		}
	} main {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str;
		int[] count = new int[26];
		while((str = br.readLine()) != null){
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++){
				char c = str.charAt(i);
				if(isLetter(c)){
					count[c - 'a']++;
				}
			}
		}
		for(int i = 0;i < count.length;i++){
			System.out.print((char)('a' + i));
			System.out.print(" : ");
			System.out.println(count[i]);
		}
	} BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String str; str int[] count = new int[26]; count new int[26] 26 while((str = br.readLine()) != null){
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++){
				char c = str.charAt(i);
				if(isLetter(c)){
					count[c - 'a']++;
				}
			}
		} (str = br.readLine()) != null (str = br.readLine()) str br.readLine() br.readLine br null {
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++){
				char c = str.charAt(i);
				if(isLetter(c)){
					count[c - 'a']++;
				}
			}
		} str = str.toLowerCase() str str.toLowerCase() str.toLowerCase str for(int i = 0;i < str.length();i++){
				char c = str.charAt(i);
				if(isLetter(c)){
					count[c - 'a']++;
				}
			} int i = 0; int i = 0; i 0 i < str.length() i str.length() str.length str i++ i++ i {
				char c = str.charAt(i);
				if(isLetter(c)){
					count[c - 'a']++;
				}
			} {
				char c = str.charAt(i);
				if(isLetter(c)){
					count[c - 'a']++;
				}
			} char c = str.charAt(i); c str.charAt(i) str.charAt str i if(isLetter(c)){
					count[c - 'a']++;
				} isLetter(c) isLetter c {
					count[c - 'a']++;
				} count[c - 'a']++ count[c - 'a'] count c - 'a' c 'a' for(int i = 0;i < count.length;i++){
			System.out.print((char)('a' + i));
			System.out.print(" : ");
			System.out.println(count[i]);
		} int i = 0; int i = 0; i 0 i < count.length i count.length count count.length i++ i++ i {
			System.out.print((char)('a' + i));
			System.out.print(" : ");
			System.out.println(count[i]);
		} {
			System.out.print((char)('a' + i));
			System.out.print(" : ");
			System.out.println(count[i]);
		} System.out.print((char)('a' + i)) System.out.print System.out System System.out (char)('a' + i) 'a' i System.out.print(" : ") System.out.print System.out System System.out " : " System.out.println(count[i]) System.out.println System.out System System.out count[i] count i String[] args args public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str;
		int[] count = new int[26];
		while((str = br.readLine()) != null){
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++){
				char c = str.charAt(i);
				if(isLetter(c)){
					count[c - 'a']++;
				}
			}
		}
		for(int i = 0;i < count.length;i++){
			System.out.print((char)('a' + i));
			System.out.print(" : ");
			System.out.println(count[i]);
		}
	}

} public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str;
		int[] count = new int[26];
		while((str = br.readLine()) != null){
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++){
				char c = str.charAt(i);
				if(isLetter(c)){
					count[c - 'a']++;
				}
			}
		}
		for(int i = 0;i < count.length;i++){
			System.out.print((char)('a' + i));
			System.out.print(" : ");
			System.out.println(count[i]);
		}
	}

} Main
import static java.lang.Character.*;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str;
		int[] count = new int[26];
		while((str = br.readLine()) != null){
			str = str.toLowerCase();
			for(int i = 0;i < str.length();i++){
				char c = str.charAt(i);
				if(isLetter(c)){
					count[c - 'a']++;
				}
			}
		}
		for(int i = 0;i < count.length;i++){
			System.out.print((char)('a' + i));
			System.out.print(" : ");
			System.out.println(count[i]);
		}
	}

}