import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);

		int[] ans = new int['z' - 'a' + 1];
		while (scan.hasNextLine()) {
			String ins = scan.nextLine();
			for (int i = 0; i < ins.length(); i++) {
				if (ins.charAt(i) >= 'a' && ins.charAt(i) <= 'z')
					ans[ins.charAt(i) - 'a'] += 1;
				else if (ins.charAt(i) >= 'A' && ins.charAt(i) <= 'Z')
					ans[ins.charAt(i) - 'A'] += 1;
			}
		}
		for (int i = 0; i < 'z' - 'a' + 1; i++) {
			System.out.println((char)('a' + i) + " : " + ans[i]);
		}

		System.exit(0);
	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);

		int[] ans = new int['z' - 'a' + 1];
		while (scan.hasNextLine()) {
			String ins = scan.nextLine();
			for (int i = 0; i < ins.length(); i++) {
				if (ins.charAt(i) >= 'a' && ins.charAt(i) <= 'z')
					ans[ins.charAt(i) - 'a'] += 1;
				else if (ins.charAt(i) >= 'A' && ins.charAt(i) <= 'Z')
					ans[ins.charAt(i) - 'A'] += 1;
			}
		}
		for (int i = 0; i < 'z' - 'a' + 1; i++) {
			System.out.println((char)('a' + i) + " : " + ans[i]);
		}

		System.exit(0);
	}

} Main public static void main(String[] args) {
		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);

		int[] ans = new int['z' - 'a' + 1];
		while (scan.hasNextLine()) {
			String ins = scan.nextLine();
			for (int i = 0; i < ins.length(); i++) {
				if (ins.charAt(i) >= 'a' && ins.charAt(i) <= 'z')
					ans[ins.charAt(i) - 'a'] += 1;
				else if (ins.charAt(i) >= 'A' && ins.charAt(i) <= 'Z')
					ans[ins.charAt(i) - 'A'] += 1;
			}
		}
		for (int i = 0; i < 'z' - 'a' + 1; i++) {
			System.out.println((char)('a' + i) + " : " + ans[i]);
		}

		System.exit(0);
	} main {
		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);

		int[] ans = new int['z' - 'a' + 1];
		while (scan.hasNextLine()) {
			String ins = scan.nextLine();
			for (int i = 0; i < ins.length(); i++) {
				if (ins.charAt(i) >= 'a' && ins.charAt(i) <= 'z')
					ans[ins.charAt(i) - 'a'] += 1;
				else if (ins.charAt(i) >= 'A' && ins.charAt(i) <= 'Z')
					ans[ins.charAt(i) - 'A'] += 1;
			}
		}
		for (int i = 0; i < 'z' - 'a' + 1; i++) {
			System.out.println((char)('a' + i) + " : " + ans[i]);
		}

		System.exit(0);
	} @SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int[] ans = new int['z' - 'a' + 1]; ans new int['z' - 'a' + 1] 'z' - 'a' + 1 'z' - 'a' 'z' 'a' 1 while (scan.hasNextLine()) {
			String ins = scan.nextLine();
			for (int i = 0; i < ins.length(); i++) {
				if (ins.charAt(i) >= 'a' && ins.charAt(i) <= 'z')
					ans[ins.charAt(i) - 'a'] += 1;
				else if (ins.charAt(i) >= 'A' && ins.charAt(i) <= 'Z')
					ans[ins.charAt(i) - 'A'] += 1;
			}
		} scan.hasNextLine() scan.hasNextLine scan {
			String ins = scan.nextLine();
			for (int i = 0; i < ins.length(); i++) {
				if (ins.charAt(i) >= 'a' && ins.charAt(i) <= 'z')
					ans[ins.charAt(i) - 'a'] += 1;
				else if (ins.charAt(i) >= 'A' && ins.charAt(i) <= 'Z')
					ans[ins.charAt(i) - 'A'] += 1;
			}
		} String ins = scan.nextLine(); ins scan.nextLine() scan.nextLine scan for (int i = 0; i < ins.length(); i++) {
				if (ins.charAt(i) >= 'a' && ins.charAt(i) <= 'z')
					ans[ins.charAt(i) - 'a'] += 1;
				else if (ins.charAt(i) >= 'A' && ins.charAt(i) <= 'Z')
					ans[ins.charAt(i) - 'A'] += 1;
			} int i = 0; int i = 0; i 0 i < ins.length() i ins.length() ins.length ins i++ i++ i {
				if (ins.charAt(i) >= 'a' && ins.charAt(i) <= 'z')
					ans[ins.charAt(i) - 'a'] += 1;
				else if (ins.charAt(i) >= 'A' && ins.charAt(i) <= 'Z')
					ans[ins.charAt(i) - 'A'] += 1;
			} {
				if (ins.charAt(i) >= 'a' && ins.charAt(i) <= 'z')
					ans[ins.charAt(i) - 'a'] += 1;
				else if (ins.charAt(i) >= 'A' && ins.charAt(i) <= 'Z')
					ans[ins.charAt(i) - 'A'] += 1;
			} if (ins.charAt(i) >= 'a' && ins.charAt(i) <= 'z')
					ans[ins.charAt(i) - 'a'] += 1;
				else if (ins.charAt(i) >= 'A' && ins.charAt(i) <= 'Z')
					ans[ins.charAt(i) - 'A'] += 1; ins.charAt(i) >= 'a' && ins.charAt(i) <= 'z' ins.charAt(i) >= 'a' ins.charAt(i) ins.charAt ins i 'a' ins.charAt(i) <= 'z' ins.charAt(i) ins.charAt ins i 'z' ans[ins.charAt(i) - 'a'] += 1 ans[ins.charAt(i) - 'a'] ans ins.charAt(i) - 'a' ins.charAt(i) ins.charAt ins i 'a' 1 if (ins.charAt(i) >= 'A' && ins.charAt(i) <= 'Z')
					ans[ins.charAt(i) - 'A'] += 1; ins.charAt(i) >= 'A' && ins.charAt(i) <= 'Z' ins.charAt(i) >= 'A' ins.charAt(i) ins.charAt ins i 'A' ins.charAt(i) <= 'Z' ins.charAt(i) ins.charAt ins i 'Z' ans[ins.charAt(i) - 'A'] += 1 ans[ins.charAt(i) - 'A'] ans ins.charAt(i) - 'A' ins.charAt(i) ins.charAt ins i 'A' 1 for (int i = 0; i < 'z' - 'a' + 1; i++) {
			System.out.println((char)('a' + i) + " : " + ans[i]);
		} int i = 0; int i = 0; i 0 i < 'z' - 'a' + 1 i 'z' - 'a' + 1 'z' - 'a' 'z' 'a' 1 i++ i++ i {
			System.out.println((char)('a' + i) + " : " + ans[i]);
		} {
			System.out.println((char)('a' + i) + " : " + ans[i]);
		} System.out.println((char)('a' + i) + " : " + ans[i]) System.out.println System.out System System.out (char)('a' + i) + " : " + ans[i] (char)('a' + i) + " : " + ans[i] (char)('a' + i) 'a' i " : " ans[i] ans i System.exit(0) System.exit System 0 String[] args args public class Main {

	public static void main(String[] args) {
		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);

		int[] ans = new int['z' - 'a' + 1];
		while (scan.hasNextLine()) {
			String ins = scan.nextLine();
			for (int i = 0; i < ins.length(); i++) {
				if (ins.charAt(i) >= 'a' && ins.charAt(i) <= 'z')
					ans[ins.charAt(i) - 'a'] += 1;
				else if (ins.charAt(i) >= 'A' && ins.charAt(i) <= 'Z')
					ans[ins.charAt(i) - 'A'] += 1;
			}
		}
		for (int i = 0; i < 'z' - 'a' + 1; i++) {
			System.out.println((char)('a' + i) + " : " + ans[i]);
		}

		System.exit(0);
	}

} public class Main {

	public static void main(String[] args) {
		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);

		int[] ans = new int['z' - 'a' + 1];
		while (scan.hasNextLine()) {
			String ins = scan.nextLine();
			for (int i = 0; i < ins.length(); i++) {
				if (ins.charAt(i) >= 'a' && ins.charAt(i) <= 'z')
					ans[ins.charAt(i) - 'a'] += 1;
				else if (ins.charAt(i) >= 'A' && ins.charAt(i) <= 'Z')
					ans[ins.charAt(i) - 'A'] += 1;
			}
		}
		for (int i = 0; i < 'z' - 'a' + 1; i++) {
			System.out.println((char)('a' + i) + " : " + ans[i]);
		}

		System.exit(0);
	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);

		int[] ans = new int['z' - 'a' + 1];
		while (scan.hasNextLine()) {
			String ins = scan.nextLine();
			for (int i = 0; i < ins.length(); i++) {
				if (ins.charAt(i) >= 'a' && ins.charAt(i) <= 'z')
					ans[ins.charAt(i) - 'a'] += 1;
				else if (ins.charAt(i) >= 'A' && ins.charAt(i) <= 'Z')
					ans[ins.charAt(i) - 'A'] += 1;
			}
		}
		for (int i = 0; i < 'z' - 'a' + 1; i++) {
			System.out.println((char)('a' + i) + " : " + ans[i]);
		}

		System.exit(0);
	}

}