import java.util.*;
import java.util.Scanner;
import java.util.Arrays;
public class Main {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		String str = "";
		int[] b = new int[26];
		while(scanner.hasNext()) {
			str = scanner.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					b[c[i] - 'a']++;
				}
			}
		}
		for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + b[i]);
		}
	}
} import java.util.*; util.* java import java.util.Scanner; Scanner java.util import java.util.Arrays; Arrays java.util public class Main {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		String str = "";
		int[] b = new int[26];
		while(scanner.hasNext()) {
			str = scanner.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					b[c[i] - 'a']++;
				}
			}
		}
		for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + b[i]);
		}
	}
} Main public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		String str = "";
		int[] b = new int[26];
		while(scanner.hasNext()) {
			str = scanner.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					b[c[i] - 'a']++;
				}
			}
		}
		for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + b[i]);
		}
	} main {
		Scanner scanner = new Scanner(System.in);
		String str = "";
		int[] b = new int[26];
		while(scanner.hasNext()) {
			str = scanner.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					b[c[i] - 'a']++;
				}
			}
		}
		for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + b[i]);
		}
	} Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) String str = ""; str "" int[] b = new int[26]; b new int[26] 26 while(scanner.hasNext()) {
			str = scanner.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					b[c[i] - 'a']++;
				}
			}
		} scanner.hasNext() scanner.hasNext scanner {
			str = scanner.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					b[c[i] - 'a']++;
				}
			}
		} str = scanner.nextLine() str scanner.nextLine() scanner.nextLine scanner str = str.toLowerCase() str str.toLowerCase() str.toLowerCase str char[] c = str.toCharArray(); c str.toCharArray() str.toCharArray str for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					b[c[i] - 'a']++;
				}
			} int i = 0; int i = 0; i 0 i < c.length i c.length c c.length i++ i++ i {
				if('a' <= c[i] && c[i] <= 'z') {
					b[c[i] - 'a']++;
				}
			} {
				if('a' <= c[i] && c[i] <= 'z') {
					b[c[i] - 'a']++;
				}
			} if('a' <= c[i] && c[i] <= 'z') {
					b[c[i] - 'a']++;
				} 'a' <= c[i] && c[i] <= 'z' 'a' <= c[i] 'a' c[i] c i c[i] <= 'z' c[i] c i 'z' {
					b[c[i] - 'a']++;
				} b[c[i] - 'a']++ b[c[i] - 'a'] b c[i] - 'a' c[i] c i 'a' for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + b[i]);
		} int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
			System.out.println(((char)(i + 'a')) + " : " + b[i]);
		} {
			System.out.println(((char)(i + 'a')) + " : " + b[i]);
		} System.out.println(((char)(i + 'a')) + " : " + b[i]) System.out.println System.out System System.out ((char)(i + 'a')) + " : " + b[i] ((char)(i + 'a')) + " : " + b[i] ((char)(i + 'a')) i 'a' " : " b[i] b i String[] args args public class Main {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		String str = "";
		int[] b = new int[26];
		while(scanner.hasNext()) {
			str = scanner.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					b[c[i] - 'a']++;
				}
			}
		}
		for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + b[i]);
		}
	}
} public class Main {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		String str = "";
		int[] b = new int[26];
		while(scanner.hasNext()) {
			str = scanner.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					b[c[i] - 'a']++;
				}
			}
		}
		for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + b[i]);
		}
	}
} Main
import java.util.*;
import java.util.Scanner;
import java.util.Arrays;
public class Main {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		String str = "";
		int[] b = new int[26];
		while(scanner.hasNext()) {
			str = scanner.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					b[c[i] - 'a']++;
				}
			}
		}
		for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + b[i]);
		}
	}
}
