import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		boolean f = true;
		int[] c = new int['z' - 'a' + 1];
		while (s.hasNext()) {
			char[] chars = s.next().toLowerCase().toCharArray();
			for (char ch : chars) {
				if (Character.isLetter(ch)) {
					c[ch - 'a']++;
				}
			}
		}
		for (int i = 0; i < c.length; ++i) {
			System.out.printf("%c : %d\n", (char)('a' + i), c[i]);
		}
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		boolean f = true;
		int[] c = new int['z' - 'a' + 1];
		while (s.hasNext()) {
			char[] chars = s.next().toLowerCase().toCharArray();
			for (char ch : chars) {
				if (Character.isLetter(ch)) {
					c[ch - 'a']++;
				}
			}
		}
		for (int i = 0; i < c.length; ++i) {
			System.out.printf("%c : %d\n", (char)('a' + i), c[i]);
		}
	}
} Main public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		boolean f = true;
		int[] c = new int['z' - 'a' + 1];
		while (s.hasNext()) {
			char[] chars = s.next().toLowerCase().toCharArray();
			for (char ch : chars) {
				if (Character.isLetter(ch)) {
					c[ch - 'a']++;
				}
			}
		}
		for (int i = 0; i < c.length; ++i) {
			System.out.printf("%c : %d\n", (char)('a' + i), c[i]);
		}
	} main {
		Scanner s = new Scanner(System.in);
		boolean f = true;
		int[] c = new int['z' - 'a' + 1];
		while (s.hasNext()) {
			char[] chars = s.next().toLowerCase().toCharArray();
			for (char ch : chars) {
				if (Character.isLetter(ch)) {
					c[ch - 'a']++;
				}
			}
		}
		for (int i = 0; i < c.length; ++i) {
			System.out.printf("%c : %d\n", (char)('a' + i), c[i]);
		}
	} Scanner s = new Scanner(System.in); s new Scanner(System.in) boolean f = true; f true int[] c = new int['z' - 'a' + 1]; c new int['z' - 'a' + 1] 'z' - 'a' + 1 'z' - 'a' 'z' 'a' 1 while (s.hasNext()) {
			char[] chars = s.next().toLowerCase().toCharArray();
			for (char ch : chars) {
				if (Character.isLetter(ch)) {
					c[ch - 'a']++;
				}
			}
		} s.hasNext() s.hasNext s {
			char[] chars = s.next().toLowerCase().toCharArray();
			for (char ch : chars) {
				if (Character.isLetter(ch)) {
					c[ch - 'a']++;
				}
			}
		} char[] chars = s.next().toLowerCase().toCharArray(); chars s.next().toLowerCase().toCharArray() s.next().toLowerCase().toCharArray s.next().toLowerCase() s.next().toLowerCase s.next() s.next s for (char ch : chars) {
				if (Character.isLetter(ch)) {
					c[ch - 'a']++;
				}
			} char ch chars {
				if (Character.isLetter(ch)) {
					c[ch - 'a']++;
				}
			} {
				if (Character.isLetter(ch)) {
					c[ch - 'a']++;
				}
			} if (Character.isLetter(ch)) {
					c[ch - 'a']++;
				} Character.isLetter(ch) Character.isLetter Character ch {
					c[ch - 'a']++;
				} c[ch - 'a']++ c[ch - 'a'] c ch - 'a' ch 'a' for (int i = 0; i < c.length; ++i) {
			System.out.printf("%c : %d\n", (char)('a' + i), c[i]);
		} int i = 0; int i = 0; i 0 i < c.length i c.length c c.length ++i ++i i {
			System.out.printf("%c : %d\n", (char)('a' + i), c[i]);
		} {
			System.out.printf("%c : %d\n", (char)('a' + i), c[i]);
		} System.out.printf("%c : %d\n", (char)('a' + i), c[i]) System.out.printf System.out System System.out "%c : %d\n" (char)('a' + i) 'a' i c[i] c i String[] args args public class Main {
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		boolean f = true;
		int[] c = new int['z' - 'a' + 1];
		while (s.hasNext()) {
			char[] chars = s.next().toLowerCase().toCharArray();
			for (char ch : chars) {
				if (Character.isLetter(ch)) {
					c[ch - 'a']++;
				}
			}
		}
		for (int i = 0; i < c.length; ++i) {
			System.out.printf("%c : %d\n", (char)('a' + i), c[i]);
		}
	}
} public class Main {
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		boolean f = true;
		int[] c = new int['z' - 'a' + 1];
		while (s.hasNext()) {
			char[] chars = s.next().toLowerCase().toCharArray();
			for (char ch : chars) {
				if (Character.isLetter(ch)) {
					c[ch - 'a']++;
				}
			}
		}
		for (int i = 0; i < c.length; ++i) {
			System.out.printf("%c : %d\n", (char)('a' + i), c[i]);
		}
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		boolean f = true;
		int[] c = new int['z' - 'a' + 1];
		while (s.hasNext()) {
			char[] chars = s.next().toLowerCase().toCharArray();
			for (char ch : chars) {
				if (Character.isLetter(ch)) {
					c[ch - 'a']++;
				}
			}
		}
		for (int i = 0; i < c.length; ++i) {
			System.out.printf("%c : %d\n", (char)('a' + i), c[i]);
		}
	}
}