import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String line;
		int[] count = new int[26];
		for (int i = 0; i < 26; i++) {
			count[i] = 0;
		}
		while (sc.hasNext()) {
			line = sc.next().toLowerCase();
			for (int i = 0; i < line.length(); i++) {
				int ch = line.charAt(i) - 'a';
				if (ch >= 0 && ch < 26) {
					count[ch]++;
				}
			}
		}
		for (int i = 0; i < 26; i++) {
			char alp = (char) ('a' + i);
			System.out.println(alp + " : " + count[i]);
		}
		sc.close();
	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String line;
		int[] count = new int[26];
		for (int i = 0; i < 26; i++) {
			count[i] = 0;
		}
		while (sc.hasNext()) {
			line = sc.next().toLowerCase();
			for (int i = 0; i < line.length(); i++) {
				int ch = line.charAt(i) - 'a';
				if (ch >= 0 && ch < 26) {
					count[ch]++;
				}
			}
		}
		for (int i = 0; i < 26; i++) {
			char alp = (char) ('a' + i);
			System.out.println(alp + " : " + count[i]);
		}
		sc.close();
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String line;
		int[] count = new int[26];
		for (int i = 0; i < 26; i++) {
			count[i] = 0;
		}
		while (sc.hasNext()) {
			line = sc.next().toLowerCase();
			for (int i = 0; i < line.length(); i++) {
				int ch = line.charAt(i) - 'a';
				if (ch >= 0 && ch < 26) {
					count[ch]++;
				}
			}
		}
		for (int i = 0; i < 26; i++) {
			char alp = (char) ('a' + i);
			System.out.println(alp + " : " + count[i]);
		}
		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		String line;
		int[] count = new int[26];
		for (int i = 0; i < 26; i++) {
			count[i] = 0;
		}
		while (sc.hasNext()) {
			line = sc.next().toLowerCase();
			for (int i = 0; i < line.length(); i++) {
				int ch = line.charAt(i) - 'a';
				if (ch >= 0 && ch < 26) {
					count[ch]++;
				}
			}
		}
		for (int i = 0; i < 26; i++) {
			char alp = (char) ('a' + i);
			System.out.println(alp + " : " + count[i]);
		}
		sc.close();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String line; line int[] count = new int[26]; count new int[26] 26 for (int i = 0; i < 26; i++) {
			count[i] = 0;
		} int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
			count[i] = 0;
		} {
			count[i] = 0;
		} count[i] = 0 count[i] count i 0 while (sc.hasNext()) {
			line = sc.next().toLowerCase();
			for (int i = 0; i < line.length(); i++) {
				int ch = line.charAt(i) - 'a';
				if (ch >= 0 && ch < 26) {
					count[ch]++;
				}
			}
		} sc.hasNext() sc.hasNext sc {
			line = sc.next().toLowerCase();
			for (int i = 0; i < line.length(); i++) {
				int ch = line.charAt(i) - 'a';
				if (ch >= 0 && ch < 26) {
					count[ch]++;
				}
			}
		} line = sc.next().toLowerCase() line sc.next().toLowerCase() sc.next().toLowerCase sc.next() sc.next sc for (int i = 0; i < line.length(); i++) {
				int ch = line.charAt(i) - 'a';
				if (ch >= 0 && ch < 26) {
					count[ch]++;
				}
			} int i = 0; int i = 0; i 0 i < line.length() i line.length() line.length line i++ i++ i {
				int ch = line.charAt(i) - 'a';
				if (ch >= 0 && ch < 26) {
					count[ch]++;
				}
			} {
				int ch = line.charAt(i) - 'a';
				if (ch >= 0 && ch < 26) {
					count[ch]++;
				}
			} int ch = line.charAt(i) - 'a'; ch line.charAt(i) - 'a' line.charAt(i) line.charAt line i 'a' if (ch >= 0 && ch < 26) {
					count[ch]++;
				} ch >= 0 && ch < 26 ch >= 0 ch 0 ch < 26 ch 26 {
					count[ch]++;
				} count[ch]++ count[ch] count ch for (int i = 0; i < 26; i++) {
			char alp = (char) ('a' + i);
			System.out.println(alp + " : " + count[i]);
		} int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
			char alp = (char) ('a' + i);
			System.out.println(alp + " : " + count[i]);
		} {
			char alp = (char) ('a' + i);
			System.out.println(alp + " : " + count[i]);
		} char alp = (char) ('a' + i); alp (char) ('a' + i) 'a' i System.out.println(alp + " : " + count[i]) System.out.println System.out System System.out alp + " : " + count[i] alp + " : " + count[i] alp " : " count[i] count i sc.close() sc.close sc String[] args args public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String line;
		int[] count = new int[26];
		for (int i = 0; i < 26; i++) {
			count[i] = 0;
		}
		while (sc.hasNext()) {
			line = sc.next().toLowerCase();
			for (int i = 0; i < line.length(); i++) {
				int ch = line.charAt(i) - 'a';
				if (ch >= 0 && ch < 26) {
					count[ch]++;
				}
			}
		}
		for (int i = 0; i < 26; i++) {
			char alp = (char) ('a' + i);
			System.out.println(alp + " : " + count[i]);
		}
		sc.close();
	}
} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String line;
		int[] count = new int[26];
		for (int i = 0; i < 26; i++) {
			count[i] = 0;
		}
		while (sc.hasNext()) {
			line = sc.next().toLowerCase();
			for (int i = 0; i < line.length(); i++) {
				int ch = line.charAt(i) - 'a';
				if (ch >= 0 && ch < 26) {
					count[ch]++;
				}
			}
		}
		for (int i = 0; i < 26; i++) {
			char alp = (char) ('a' + i);
			System.out.println(alp + " : " + count[i]);
		}
		sc.close();
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String line;
		int[] count = new int[26];
		for (int i = 0; i < 26; i++) {
			count[i] = 0;
		}
		while (sc.hasNext()) {
			line = sc.next().toLowerCase();
			for (int i = 0; i < line.length(); i++) {
				int ch = line.charAt(i) - 'a';
				if (ch >= 0 && ch < 26) {
					count[ch]++;
				}
			}
		}
		for (int i = 0; i < 26; i++) {
			char alp = (char) ('a' + i);
			System.out.println(alp + " : " + count[i]);
		}
		sc.close();
	}
}
