import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int[] count = new int[26];

		while(sc.hasNext()) {
			String input = sc.nextLine();
			String tmp = input.toLowerCase().replace(" ", "");

			for(char c : tmp.toCharArray()) {
				if('a' <= c && c <= 'z') {
					count[(int)c - (int)'a']++;
				}
			}
		}
		sc.close();

		for (int i = 0; i < 26; i++) {
			char now = (char)( (int)'a' + i );

			System.out.println(now + " : " + count[i]);
		}
	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int[] count = new int[26];

		while(sc.hasNext()) {
			String input = sc.nextLine();
			String tmp = input.toLowerCase().replace(" ", "");

			for(char c : tmp.toCharArray()) {
				if('a' <= c && c <= 'z') {
					count[(int)c - (int)'a']++;
				}
			}
		}
		sc.close();

		for (int i = 0; i < 26; i++) {
			char now = (char)( (int)'a' + i );

			System.out.println(now + " : " + count[i]);
		}
	}
} Main public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int[] count = new int[26];

		while(sc.hasNext()) {
			String input = sc.nextLine();
			String tmp = input.toLowerCase().replace(" ", "");

			for(char c : tmp.toCharArray()) {
				if('a' <= c && c <= 'z') {
					count[(int)c - (int)'a']++;
				}
			}
		}
		sc.close();

		for (int i = 0; i < 26; i++) {
			char now = (char)( (int)'a' + i );

			System.out.println(now + " : " + count[i]);
		}
	} main {

		Scanner sc = new Scanner(System.in);

		int[] count = new int[26];

		while(sc.hasNext()) {
			String input = sc.nextLine();
			String tmp = input.toLowerCase().replace(" ", "");

			for(char c : tmp.toCharArray()) {
				if('a' <= c && c <= 'z') {
					count[(int)c - (int)'a']++;
				}
			}
		}
		sc.close();

		for (int i = 0; i < 26; i++) {
			char now = (char)( (int)'a' + i );

			System.out.println(now + " : " + count[i]);
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] count = new int[26]; count new int[26] 26 while(sc.hasNext()) {
			String input = sc.nextLine();
			String tmp = input.toLowerCase().replace(" ", "");

			for(char c : tmp.toCharArray()) {
				if('a' <= c && c <= 'z') {
					count[(int)c - (int)'a']++;
				}
			}
		} sc.hasNext() sc.hasNext sc {
			String input = sc.nextLine();
			String tmp = input.toLowerCase().replace(" ", "");

			for(char c : tmp.toCharArray()) {
				if('a' <= c && c <= 'z') {
					count[(int)c - (int)'a']++;
				}
			}
		} String input = sc.nextLine(); input sc.nextLine() sc.nextLine sc String tmp = input.toLowerCase().replace(" ", ""); tmp input.toLowerCase().replace(" ", "") input.toLowerCase().replace input.toLowerCase() input.toLowerCase input " " "" for(char c : tmp.toCharArray()) {
				if('a' <= c && c <= 'z') {
					count[(int)c - (int)'a']++;
				}
			} char c tmp.toCharArray() tmp.toCharArray tmp {
				if('a' <= c && c <= 'z') {
					count[(int)c - (int)'a']++;
				}
			} {
				if('a' <= c && c <= 'z') {
					count[(int)c - (int)'a']++;
				}
			} if('a' <= c && c <= 'z') {
					count[(int)c - (int)'a']++;
				} 'a' <= c && c <= 'z' 'a' <= c 'a' c c <= 'z' c 'z' {
					count[(int)c - (int)'a']++;
				} count[(int)c - (int)'a']++ count[(int)c - (int)'a'] count (int)c - (int)'a' (int)c (int)'a' sc.close() sc.close sc for (int i = 0; i < 26; i++) {
			char now = (char)( (int)'a' + i );

			System.out.println(now + " : " + count[i]);
		} int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
			char now = (char)( (int)'a' + i );

			System.out.println(now + " : " + count[i]);
		} {
			char now = (char)( (int)'a' + i );

			System.out.println(now + " : " + count[i]);
		} char now = (char)( (int)'a' + i ); now (char)( (int)'a' + i ) (int)'a' i System.out.println(now + " : " + count[i]) System.out.println System.out System System.out now + " : " + count[i] now + " : " + count[i] now " : " count[i] count i String[] args args public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int[] count = new int[26];

		while(sc.hasNext()) {
			String input = sc.nextLine();
			String tmp = input.toLowerCase().replace(" ", "");

			for(char c : tmp.toCharArray()) {
				if('a' <= c && c <= 'z') {
					count[(int)c - (int)'a']++;
				}
			}
		}
		sc.close();

		for (int i = 0; i < 26; i++) {
			char now = (char)( (int)'a' + i );

			System.out.println(now + " : " + count[i]);
		}
	}
} public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int[] count = new int[26];

		while(sc.hasNext()) {
			String input = sc.nextLine();
			String tmp = input.toLowerCase().replace(" ", "");

			for(char c : tmp.toCharArray()) {
				if('a' <= c && c <= 'z') {
					count[(int)c - (int)'a']++;
				}
			}
		}
		sc.close();

		for (int i = 0; i < 26; i++) {
			char now = (char)( (int)'a' + i );

			System.out.println(now + " : " + count[i]);
		}
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int[] count = new int[26];

		while(sc.hasNext()) {
			String input = sc.nextLine();
			String tmp = input.toLowerCase().replace(" ", "");

			for(char c : tmp.toCharArray()) {
				if('a' <= c && c <= 'z') {
					count[(int)c - (int)'a']++;
				}
			}
		}
		sc.close();

		for (int i = 0; i < 26; i++) {
			char now = (char)( (int)'a' + i );

			System.out.println(now + " : " + count[i]);
		}
	}
}