import static java.lang.Character.isLowerCase;
import static java.lang.Character.isUpperCase;
import static java.lang.Character.toLowerCase;

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

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int[] cnt = new int[26];
		String line;
		while ((line = br.readLine()) != null) {
			char[] chars = line.toCharArray();
			for (char c : chars) {
				if (!isLowerCase(c) && !isUpperCase(c))
					continue;

				cnt[toLowerCase(c) - 'a']++;
			}
		}

		for (int i = 0; i < cnt.length; i++) {
			System.out.print((char) ('a' + i));
			System.out.println(" : " + cnt[i]);
		}
	}
} import static java.lang.Character.isLowerCase; import static java.lang.Character.isLowerCase; import static java.lang.Character.isLowerCase; import static java.lang.Character.isUpperCase; import static java.lang.Character.isUpperCase; import static java.lang.Character.isUpperCase; import static java.lang.Character.toLowerCase; import static java.lang.Character.toLowerCase; import static java.lang.Character.toLowerCase; import java.io.BufferedReader; BufferedReader java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int[] cnt = new int[26];
		String line;
		while ((line = br.readLine()) != null) {
			char[] chars = line.toCharArray();
			for (char c : chars) {
				if (!isLowerCase(c) && !isUpperCase(c))
					continue;

				cnt[toLowerCase(c) - 'a']++;
			}
		}

		for (int i = 0; i < cnt.length; i++) {
			System.out.print((char) ('a' + i));
			System.out.println(" : " + cnt[i]);
		}
	}
} Main public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int[] cnt = new int[26];
		String line;
		while ((line = br.readLine()) != null) {
			char[] chars = line.toCharArray();
			for (char c : chars) {
				if (!isLowerCase(c) && !isUpperCase(c))
					continue;

				cnt[toLowerCase(c) - 'a']++;
			}
		}

		for (int i = 0; i < cnt.length; i++) {
			System.out.print((char) ('a' + i));
			System.out.println(" : " + cnt[i]);
		}
	} main {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int[] cnt = new int[26];
		String line;
		while ((line = br.readLine()) != null) {
			char[] chars = line.toCharArray();
			for (char c : chars) {
				if (!isLowerCase(c) && !isUpperCase(c))
					continue;

				cnt[toLowerCase(c) - 'a']++;
			}
		}

		for (int i = 0; i < cnt.length; i++) {
			System.out.print((char) ('a' + i));
			System.out.println(" : " + cnt[i]);
		}
	} BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) int[] cnt = new int[26]; cnt new int[26] 26 String line; line while ((line = br.readLine()) != null) {
			char[] chars = line.toCharArray();
			for (char c : chars) {
				if (!isLowerCase(c) && !isUpperCase(c))
					continue;

				cnt[toLowerCase(c) - 'a']++;
			}
		} (line = br.readLine()) != null (line = br.readLine()) line br.readLine() br.readLine br null {
			char[] chars = line.toCharArray();
			for (char c : chars) {
				if (!isLowerCase(c) && !isUpperCase(c))
					continue;

				cnt[toLowerCase(c) - 'a']++;
			}
		} char[] chars = line.toCharArray(); chars line.toCharArray() line.toCharArray line for (char c : chars) {
				if (!isLowerCase(c) && !isUpperCase(c))
					continue;

				cnt[toLowerCase(c) - 'a']++;
			} char c chars {
				if (!isLowerCase(c) && !isUpperCase(c))
					continue;

				cnt[toLowerCase(c) - 'a']++;
			} {
				if (!isLowerCase(c) && !isUpperCase(c))
					continue;

				cnt[toLowerCase(c) - 'a']++;
			} if (!isLowerCase(c) && !isUpperCase(c))
					continue; !isLowerCase(c) && !isUpperCase(c) !isLowerCase(c) isLowerCase(c) isLowerCase c !isUpperCase(c) isUpperCase(c) isUpperCase c continue; cnt[toLowerCase(c) - 'a']++ cnt[toLowerCase(c) - 'a'] cnt toLowerCase(c) - 'a' toLowerCase(c) toLowerCase c 'a' for (int i = 0; i < cnt.length; i++) {
			System.out.print((char) ('a' + i));
			System.out.println(" : " + cnt[i]);
		} int i = 0; int i = 0; i 0 i < cnt.length i cnt.length cnt cnt.length i++ i++ i {
			System.out.print((char) ('a' + i));
			System.out.println(" : " + cnt[i]);
		} {
			System.out.print((char) ('a' + i));
			System.out.println(" : " + cnt[i]);
		} System.out.print((char) ('a' + i)) System.out.print System.out System System.out (char) ('a' + i) 'a' i System.out.println(" : " + cnt[i]) System.out.println System.out System System.out " : " + cnt[i] " : " cnt[i] cnt i String[] args args public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int[] cnt = new int[26];
		String line;
		while ((line = br.readLine()) != null) {
			char[] chars = line.toCharArray();
			for (char c : chars) {
				if (!isLowerCase(c) && !isUpperCase(c))
					continue;

				cnt[toLowerCase(c) - 'a']++;
			}
		}

		for (int i = 0; i < cnt.length; i++) {
			System.out.print((char) ('a' + i));
			System.out.println(" : " + cnt[i]);
		}
	}
} public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int[] cnt = new int[26];
		String line;
		while ((line = br.readLine()) != null) {
			char[] chars = line.toCharArray();
			for (char c : chars) {
				if (!isLowerCase(c) && !isUpperCase(c))
					continue;

				cnt[toLowerCase(c) - 'a']++;
			}
		}

		for (int i = 0; i < cnt.length; i++) {
			System.out.print((char) ('a' + i));
			System.out.println(" : " + cnt[i]);
		}
	}
} Main
import static java.lang.Character.isLowerCase;
import static java.lang.Character.isUpperCase;
import static java.lang.Character.toLowerCase;

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

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int[] cnt = new int[26];
		String line;
		while ((line = br.readLine()) != null) {
			char[] chars = line.toCharArray();
			for (char c : chars) {
				if (!isLowerCase(c) && !isUpperCase(c))
					continue;

				cnt[toLowerCase(c) - 'a']++;
			}
		}

		for (int i = 0; i < cnt.length; i++) {
			System.out.print((char) ('a' + i));
			System.out.println(" : " + cnt[i]);
		}
	}
}