import java.io.*;

public class Main {

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

} import java.io.*; io.* java public class Main {

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

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

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

} public class Main {

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

} Main
import java.io.*;

public class Main {

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

}