import java.util.Scanner;

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

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