import java.util.Scanner;

public class Main {
	public static final int MAX = 256;

	public static void main(String[] args) {
		int i = 0, k = 0;
		char ch1 = 0;
		Scanner sc = new Scanner(System.in);
		int[] chars = new int[256];
		while (sc.hasNextLine()) {
			String line = sc.nextLine();
			for (i = 0; i < line.length(); i++) {
				char ch = Character.toLowerCase(line.charAt(i));
				chars[ch]++;
			}
		}
		for (char ch = 'a'; ch <= 'z'; ch++)
			System.out.println(ch + " : " + chars[ch]);
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static final int MAX = 256;

	public static void main(String[] args) {
		int i = 0, k = 0;
		char ch1 = 0;
		Scanner sc = new Scanner(System.in);
		int[] chars = new int[256];
		while (sc.hasNextLine()) {
			String line = sc.nextLine();
			for (i = 0; i < line.length(); i++) {
				char ch = Character.toLowerCase(line.charAt(i));
				chars[ch]++;
			}
		}
		for (char ch = 'a'; ch <= 'z'; ch++)
			System.out.println(ch + " : " + chars[ch]);
	}
} Main public static final int MAX = 256; MAX 256 public static void main(String[] args) {
		int i = 0, k = 0;
		char ch1 = 0;
		Scanner sc = new Scanner(System.in);
		int[] chars = new int[256];
		while (sc.hasNextLine()) {
			String line = sc.nextLine();
			for (i = 0; i < line.length(); i++) {
				char ch = Character.toLowerCase(line.charAt(i));
				chars[ch]++;
			}
		}
		for (char ch = 'a'; ch <= 'z'; ch++)
			System.out.println(ch + " : " + chars[ch]);
	} main {
		int i = 0, k = 0;
		char ch1 = 0;
		Scanner sc = new Scanner(System.in);
		int[] chars = new int[256];
		while (sc.hasNextLine()) {
			String line = sc.nextLine();
			for (i = 0; i < line.length(); i++) {
				char ch = Character.toLowerCase(line.charAt(i));
				chars[ch]++;
			}
		}
		for (char ch = 'a'; ch <= 'z'; ch++)
			System.out.println(ch + " : " + chars[ch]);
	} int i = 0 i 0 k = 0; k 0 char ch1 = 0; ch1 0 Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] chars = new int[256]; chars new int[256] 256 while (sc.hasNextLine()) {
			String line = sc.nextLine();
			for (i = 0; i < line.length(); i++) {
				char ch = Character.toLowerCase(line.charAt(i));
				chars[ch]++;
			}
		} sc.hasNextLine() sc.hasNextLine sc {
			String line = sc.nextLine();
			for (i = 0; i < line.length(); i++) {
				char ch = Character.toLowerCase(line.charAt(i));
				chars[ch]++;
			}
		} String line = sc.nextLine(); line sc.nextLine() sc.nextLine sc for (i = 0; i < line.length(); i++) {
				char ch = Character.toLowerCase(line.charAt(i));
				chars[ch]++;
			} i = 0; i = 0 i 0 i < line.length() i line.length() line.length line i++ i++ i {
				char ch = Character.toLowerCase(line.charAt(i));
				chars[ch]++;
			} {
				char ch = Character.toLowerCase(line.charAt(i));
				chars[ch]++;
			} char ch = Character.toLowerCase(line.charAt(i)); ch Character.toLowerCase(line.charAt(i)) Character.toLowerCase Character line.charAt(i) line.charAt line i chars[ch]++ chars[ch] chars ch for (char ch = 'a'; ch <= 'z'; ch++)
			System.out.println(ch + " : " + chars[ch]); char ch = 'a'; char ch = 'a'; ch 'a' ch <= 'z' ch 'z' ch++ ch++ ch System.out.println(ch + " : " + chars[ch]); System.out.println(ch + " : " + chars[ch]) System.out.println System.out System System.out ch + " : " + chars[ch] ch + " : " + chars[ch] ch " : " chars[ch] chars ch String[] args args public class Main {
	public static final int MAX = 256;

	public static void main(String[] args) {
		int i = 0, k = 0;
		char ch1 = 0;
		Scanner sc = new Scanner(System.in);
		int[] chars = new int[256];
		while (sc.hasNextLine()) {
			String line = sc.nextLine();
			for (i = 0; i < line.length(); i++) {
				char ch = Character.toLowerCase(line.charAt(i));
				chars[ch]++;
			}
		}
		for (char ch = 'a'; ch <= 'z'; ch++)
			System.out.println(ch + " : " + chars[ch]);
	}
} public class Main {
	public static final int MAX = 256;

	public static void main(String[] args) {
		int i = 0, k = 0;
		char ch1 = 0;
		Scanner sc = new Scanner(System.in);
		int[] chars = new int[256];
		while (sc.hasNextLine()) {
			String line = sc.nextLine();
			for (i = 0; i < line.length(); i++) {
				char ch = Character.toLowerCase(line.charAt(i));
				chars[ch]++;
			}
		}
		for (char ch = 'a'; ch <= 'z'; ch++)
			System.out.println(ch + " : " + chars[ch]);
	}
} Main
import java.util.Scanner;

public class Main {
	public static final int MAX = 256;

	public static void main(String[] args) {
		int i = 0, k = 0;
		char ch1 = 0;
		Scanner sc = new Scanner(System.in);
		int[] chars = new int[256];
		while (sc.hasNextLine()) {
			String line = sc.nextLine();
			for (i = 0; i < line.length(); i++) {
				char ch = Character.toLowerCase(line.charAt(i));
				chars[ch]++;
			}
		}
		for (char ch = 'a'; ch <= 'z'; ch++)
			System.out.println(ch + " : " + chars[ch]);
	}
}