import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String str = null;
		int count[] = new int[26];

		while (sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char ch[] = str.toCharArray();
			for (int i = 0; i < ch.length; i++) {
				if (Character.isAlphabetic(ch[i])) {
					int x = ch[i] - 'a';
					count[x]++;
				}
			}
		}

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

	}

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

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String str = null;
		int count[] = new int[26];

		while (sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char ch[] = str.toCharArray();
			for (int i = 0; i < ch.length; i++) {
				if (Character.isAlphabetic(ch[i])) {
					int x = ch[i] - 'a';
					count[x]++;
				}
			}
		}

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

	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String str = null;
		int count[] = new int[26];

		while (sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char ch[] = str.toCharArray();
			for (int i = 0; i < ch.length; i++) {
				if (Character.isAlphabetic(ch[i])) {
					int x = ch[i] - 'a';
					count[x]++;
				}
			}
		}

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

	} main {
		Scanner sc = new Scanner(System.in);

		String str = null;
		int count[] = new int[26];

		while (sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char ch[] = str.toCharArray();
			for (int i = 0; i < ch.length; i++) {
				if (Character.isAlphabetic(ch[i])) {
					int x = ch[i] - 'a';
					count[x]++;
				}
			}
		}

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

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String str = null; str null int count[] = new int[26]; count new int[26] 26 while (sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char ch[] = str.toCharArray();
			for (int i = 0; i < ch.length; i++) {
				if (Character.isAlphabetic(ch[i])) {
					int x = ch[i] - 'a';
					count[x]++;
				}
			}
		} sc.hasNext() sc.hasNext sc {
			str = sc.nextLine();
			str = str.toLowerCase();
			char ch[] = str.toCharArray();
			for (int i = 0; i < ch.length; i++) {
				if (Character.isAlphabetic(ch[i])) {
					int x = ch[i] - 'a';
					count[x]++;
				}
			}
		} str = sc.nextLine() str sc.nextLine() sc.nextLine sc str = str.toLowerCase() str str.toLowerCase() str.toLowerCase str char ch[] = str.toCharArray(); ch str.toCharArray() str.toCharArray str for (int i = 0; i < ch.length; i++) {
				if (Character.isAlphabetic(ch[i])) {
					int x = ch[i] - 'a';
					count[x]++;
				}
			} int i = 0; int i = 0; i 0 i < ch.length i ch.length ch ch.length i++ i++ i {
				if (Character.isAlphabetic(ch[i])) {
					int x = ch[i] - 'a';
					count[x]++;
				}
			} {
				if (Character.isAlphabetic(ch[i])) {
					int x = ch[i] - 'a';
					count[x]++;
				}
			} if (Character.isAlphabetic(ch[i])) {
					int x = ch[i] - 'a';
					count[x]++;
				} Character.isAlphabetic(ch[i]) Character.isAlphabetic Character ch[i] ch i {
					int x = ch[i] - 'a';
					count[x]++;
				} int x = ch[i] - 'a'; x ch[i] - 'a' ch[i] ch i 'a' count[x]++ count[x] count x for (int i = 0; i < count.length; i++) {
			char x = (char) ('a' + i);
			System.out.print(x + " : ");
			System.out.println(count[i]);
		} int i = 0; int i = 0; i 0 i < count.length i count.length count count.length i++ i++ i {
			char x = (char) ('a' + i);
			System.out.print(x + " : ");
			System.out.println(count[i]);
		} {
			char x = (char) ('a' + i);
			System.out.print(x + " : ");
			System.out.println(count[i]);
		} char x = (char) ('a' + i); x (char) ('a' + i) 'a' i System.out.print(x + " : ") System.out.print System.out System System.out x + " : " x " : " System.out.println(count[i]) System.out.println System.out System System.out count[i] count i String[] args args public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String str = null;
		int count[] = new int[26];

		while (sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char ch[] = str.toCharArray();
			for (int i = 0; i < ch.length; i++) {
				if (Character.isAlphabetic(ch[i])) {
					int x = ch[i] - 'a';
					count[x]++;
				}
			}
		}

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

	}

} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String str = null;
		int count[] = new int[26];

		while (sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char ch[] = str.toCharArray();
			for (int i = 0; i < ch.length; i++) {
				if (Character.isAlphabetic(ch[i])) {
					int x = ch[i] - 'a';
					count[x]++;
				}
			}
		}

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

	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String str = null;
		int count[] = new int[26];

		while (sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char ch[] = str.toCharArray();
			for (int i = 0; i < ch.length; i++) {
				if (Character.isAlphabetic(ch[i])) {
					int x = ch[i] - 'a';
					count[x]++;
				}
			}
		}

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

	}

}