import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		String alphabet[] = new String[]{"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
		int [] count = new int[26];
		Scanner sc = new Scanner(System.in);
		String inputValues = "";
		while (true) {
			String tmp = sc.nextLine();
			inputValues += tmp;
			if (!sc.hasNext()) {
				break;
			}
		}
		inputValues = inputValues.toLowerCase();
		String[] strAry = inputValues.split("");
		for (int i = 0; i < strAry.length; i++) {
			for (int j = 0; j < 26; j++) {
				if (strAry[i].equals(alphabet[j])) {
					count[j]++;
				}
			}
		}
		for (int i = 0; i < 26; i++) {
			System.out.println(String.format("%s : %d", alphabet[i], count[i]));
		}
	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		String alphabet[] = new String[]{"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
		int [] count = new int[26];
		Scanner sc = new Scanner(System.in);
		String inputValues = "";
		while (true) {
			String tmp = sc.nextLine();
			inputValues += tmp;
			if (!sc.hasNext()) {
				break;
			}
		}
		inputValues = inputValues.toLowerCase();
		String[] strAry = inputValues.split("");
		for (int i = 0; i < strAry.length; i++) {
			for (int j = 0; j < 26; j++) {
				if (strAry[i].equals(alphabet[j])) {
					count[j]++;
				}
			}
		}
		for (int i = 0; i < 26; i++) {
			System.out.println(String.format("%s : %d", alphabet[i], count[i]));
		}
	}
} Main public static void main(String[] args) {
		String alphabet[] = new String[]{"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
		int [] count = new int[26];
		Scanner sc = new Scanner(System.in);
		String inputValues = "";
		while (true) {
			String tmp = sc.nextLine();
			inputValues += tmp;
			if (!sc.hasNext()) {
				break;
			}
		}
		inputValues = inputValues.toLowerCase();
		String[] strAry = inputValues.split("");
		for (int i = 0; i < strAry.length; i++) {
			for (int j = 0; j < 26; j++) {
				if (strAry[i].equals(alphabet[j])) {
					count[j]++;
				}
			}
		}
		for (int i = 0; i < 26; i++) {
			System.out.println(String.format("%s : %d", alphabet[i], count[i]));
		}
	} main {
		String alphabet[] = new String[]{"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
		int [] count = new int[26];
		Scanner sc = new Scanner(System.in);
		String inputValues = "";
		while (true) {
			String tmp = sc.nextLine();
			inputValues += tmp;
			if (!sc.hasNext()) {
				break;
			}
		}
		inputValues = inputValues.toLowerCase();
		String[] strAry = inputValues.split("");
		for (int i = 0; i < strAry.length; i++) {
			for (int j = 0; j < 26; j++) {
				if (strAry[i].equals(alphabet[j])) {
					count[j]++;
				}
			}
		}
		for (int i = 0; i < 26; i++) {
			System.out.println(String.format("%s : %d", alphabet[i], count[i]));
		}
	} String alphabet[] = new String[]{"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"}; alphabet new String[]{"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"} int [] count = new int[26]; count new int[26] 26 Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String inputValues = ""; inputValues "" while (true) {
			String tmp = sc.nextLine();
			inputValues += tmp;
			if (!sc.hasNext()) {
				break;
			}
		} true {
			String tmp = sc.nextLine();
			inputValues += tmp;
			if (!sc.hasNext()) {
				break;
			}
		} String tmp = sc.nextLine(); tmp sc.nextLine() sc.nextLine sc inputValues += tmp inputValues tmp if (!sc.hasNext()) {
				break;
			} !sc.hasNext() sc.hasNext() sc.hasNext sc {
				break;
			} break; inputValues = inputValues.toLowerCase() inputValues inputValues.toLowerCase() inputValues.toLowerCase inputValues String[] strAry = inputValues.split(""); strAry inputValues.split("") inputValues.split inputValues "" for (int i = 0; i < strAry.length; i++) {
			for (int j = 0; j < 26; j++) {
				if (strAry[i].equals(alphabet[j])) {
					count[j]++;
				}
			}
		} int i = 0; int i = 0; i 0 i < strAry.length i strAry.length strAry strAry.length i++ i++ i {
			for (int j = 0; j < 26; j++) {
				if (strAry[i].equals(alphabet[j])) {
					count[j]++;
				}
			}
		} {
			for (int j = 0; j < 26; j++) {
				if (strAry[i].equals(alphabet[j])) {
					count[j]++;
				}
			}
		} for (int j = 0; j < 26; j++) {
				if (strAry[i].equals(alphabet[j])) {
					count[j]++;
				}
			} int j = 0; int j = 0; j 0 j < 26 j 26 j++ j++ j {
				if (strAry[i].equals(alphabet[j])) {
					count[j]++;
				}
			} {
				if (strAry[i].equals(alphabet[j])) {
					count[j]++;
				}
			} if (strAry[i].equals(alphabet[j])) {
					count[j]++;
				} strAry[i].equals(alphabet[j]) strAry[i].equals strAry[i] strAry i alphabet[j] alphabet j {
					count[j]++;
				} count[j]++ count[j] count j for (int i = 0; i < 26; i++) {
			System.out.println(String.format("%s : %d", alphabet[i], count[i]));
		} int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
			System.out.println(String.format("%s : %d", alphabet[i], count[i]));
		} {
			System.out.println(String.format("%s : %d", alphabet[i], count[i]));
		} System.out.println(String.format("%s : %d", alphabet[i], count[i])) System.out.println System.out System System.out String.format("%s : %d", alphabet[i], count[i]) String.format String "%s : %d" alphabet[i] alphabet i count[i] count i String[] args args public class Main {

	public static void main(String[] args) {
		String alphabet[] = new String[]{"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
		int [] count = new int[26];
		Scanner sc = new Scanner(System.in);
		String inputValues = "";
		while (true) {
			String tmp = sc.nextLine();
			inputValues += tmp;
			if (!sc.hasNext()) {
				break;
			}
		}
		inputValues = inputValues.toLowerCase();
		String[] strAry = inputValues.split("");
		for (int i = 0; i < strAry.length; i++) {
			for (int j = 0; j < 26; j++) {
				if (strAry[i].equals(alphabet[j])) {
					count[j]++;
				}
			}
		}
		for (int i = 0; i < 26; i++) {
			System.out.println(String.format("%s : %d", alphabet[i], count[i]));
		}
	}
} public class Main {

	public static void main(String[] args) {
		String alphabet[] = new String[]{"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
		int [] count = new int[26];
		Scanner sc = new Scanner(System.in);
		String inputValues = "";
		while (true) {
			String tmp = sc.nextLine();
			inputValues += tmp;
			if (!sc.hasNext()) {
				break;
			}
		}
		inputValues = inputValues.toLowerCase();
		String[] strAry = inputValues.split("");
		for (int i = 0; i < strAry.length; i++) {
			for (int j = 0; j < 26; j++) {
				if (strAry[i].equals(alphabet[j])) {
					count[j]++;
				}
			}
		}
		for (int i = 0; i < 26; i++) {
			System.out.println(String.format("%s : %d", alphabet[i], count[i]));
		}
	}
} Main
import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		String alphabet[] = new String[]{"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
		int [] count = new int[26];
		Scanner sc = new Scanner(System.in);
		String inputValues = "";
		while (true) {
			String tmp = sc.nextLine();
			inputValues += tmp;
			if (!sc.hasNext()) {
				break;
			}
		}
		inputValues = inputValues.toLowerCase();
		String[] strAry = inputValues.split("");
		for (int i = 0; i < strAry.length; i++) {
			for (int j = 0; j < 26; j++) {
				if (strAry[i].equals(alphabet[j])) {
					count[j]++;
				}
			}
		}
		for (int i = 0; i < 26; i++) {
			System.out.println(String.format("%s : %d", alphabet[i], count[i]));
		}
	}
}