import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		
		// ??\???
		Scanner scan = new Scanner(System.in);
		scan.useDelimiter("\\r\\n");
		
		// ??????
		int count[];
		count = new int[26];
		while(scan.hasNext()) {
			String S = scan.nextLine();
			// ???????????????
			int sl = S.length();
			// ?°???????????????????
			String s = S.toLowerCase();
			// 1????????\???char??????????´?
			char[] charArray = s.toCharArray();
			for (char ch : charArray) {
				int CH = ch;
				// a-z?????°??????
				if(((CH-97)>=0) && ((CH-97)<26)){
					count[CH-97]++;
				}
			}
		}
		// ??????
		for (int i=0; i<26; i++) {
			int cords = i + 97;
			char c = (char)cords;
			System.out.println(c + " : " + count[i]);
		}

		
	}

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

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		
		// ??\???
		Scanner scan = new Scanner(System.in);
		scan.useDelimiter("\\r\\n");
		
		// ??????
		int count[];
		count = new int[26];
		while(scan.hasNext()) {
			String S = scan.nextLine();
			// ???????????????
			int sl = S.length();
			// ?°???????????????????
			String s = S.toLowerCase();
			// 1????????\???char??????????´?
			char[] charArray = s.toCharArray();
			for (char ch : charArray) {
				int CH = ch;
				// a-z?????°??????
				if(((CH-97)>=0) && ((CH-97)<26)){
					count[CH-97]++;
				}
			}
		}
		// ??????
		for (int i=0; i<26; i++) {
			int cords = i + 97;
			char c = (char)cords;
			System.out.println(c + " : " + count[i]);
		}

		
	}

} Main public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		
		// ??\???
		Scanner scan = new Scanner(System.in);
		scan.useDelimiter("\\r\\n");
		
		// ??????
		int count[];
		count = new int[26];
		while(scan.hasNext()) {
			String S = scan.nextLine();
			// ???????????????
			int sl = S.length();
			// ?°???????????????????
			String s = S.toLowerCase();
			// 1????????\???char??????????´?
			char[] charArray = s.toCharArray();
			for (char ch : charArray) {
				int CH = ch;
				// a-z?????°??????
				if(((CH-97)>=0) && ((CH-97)<26)){
					count[CH-97]++;
				}
			}
		}
		// ??????
		for (int i=0; i<26; i++) {
			int cords = i + 97;
			char c = (char)cords;
			System.out.println(c + " : " + count[i]);
		}

		
	} main {
		// TODO ?????????????????????????????????????????????

		
		// ??\???
		Scanner scan = new Scanner(System.in);
		scan.useDelimiter("\\r\\n");
		
		// ??????
		int count[];
		count = new int[26];
		while(scan.hasNext()) {
			String S = scan.nextLine();
			// ???????????????
			int sl = S.length();
			// ?°???????????????????
			String s = S.toLowerCase();
			// 1????????\???char??????????´?
			char[] charArray = s.toCharArray();
			for (char ch : charArray) {
				int CH = ch;
				// a-z?????°??????
				if(((CH-97)>=0) && ((CH-97)<26)){
					count[CH-97]++;
				}
			}
		}
		// ??????
		for (int i=0; i<26; i++) {
			int cords = i + 97;
			char c = (char)cords;
			System.out.println(c + " : " + count[i]);
		}

		
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) scan.useDelimiter("\\r\\n") scan.useDelimiter scan "\\r\\n" int count[]; count count = new int[26] count new int[26] 26 while(scan.hasNext()) {
			String S = scan.nextLine();
			// ???????????????
			int sl = S.length();
			// ?°???????????????????
			String s = S.toLowerCase();
			// 1????????\???char??????????´?
			char[] charArray = s.toCharArray();
			for (char ch : charArray) {
				int CH = ch;
				// a-z?????°??????
				if(((CH-97)>=0) && ((CH-97)<26)){
					count[CH-97]++;
				}
			}
		} scan.hasNext() scan.hasNext scan {
			String S = scan.nextLine();
			// ???????????????
			int sl = S.length();
			// ?°???????????????????
			String s = S.toLowerCase();
			// 1????????\???char??????????´?
			char[] charArray = s.toCharArray();
			for (char ch : charArray) {
				int CH = ch;
				// a-z?????°??????
				if(((CH-97)>=0) && ((CH-97)<26)){
					count[CH-97]++;
				}
			}
		} String S = scan.nextLine(); S scan.nextLine() scan.nextLine scan int sl = S.length(); sl S.length() S.length S String s = S.toLowerCase(); s S.toLowerCase() S.toLowerCase S char[] charArray = s.toCharArray(); charArray s.toCharArray() s.toCharArray s for (char ch : charArray) {
				int CH = ch;
				// a-z?????°??????
				if(((CH-97)>=0) && ((CH-97)<26)){
					count[CH-97]++;
				}
			} char ch charArray {
				int CH = ch;
				// a-z?????°??????
				if(((CH-97)>=0) && ((CH-97)<26)){
					count[CH-97]++;
				}
			} {
				int CH = ch;
				// a-z?????°??????
				if(((CH-97)>=0) && ((CH-97)<26)){
					count[CH-97]++;
				}
			} int CH = ch; CH ch if(((CH-97)>=0) && ((CH-97)<26)){
					count[CH-97]++;
				} ((CH-97)>=0) && ((CH-97)<26) ((CH-97)>=0) (CH-97) CH 97 0 ((CH-97)<26) (CH-97) CH 97 26 {
					count[CH-97]++;
				} count[CH-97]++ count[CH-97] count CH-97 CH 97 for (int i=0; i<26; i++) {
			int cords = i + 97;
			char c = (char)cords;
			System.out.println(c + " : " + count[i]);
		} int i=0; int i=0; i 0 i<26 i 26 i++ i++ i {
			int cords = i + 97;
			char c = (char)cords;
			System.out.println(c + " : " + count[i]);
		} {
			int cords = i + 97;
			char c = (char)cords;
			System.out.println(c + " : " + count[i]);
		} int cords = i + 97; cords i + 97 i 97 char c = (char)cords; c (char)cords System.out.println(c + " : " + count[i]) System.out.println System.out System System.out c + " : " + count[i] c + " : " + count[i] c " : " count[i] count i String[] args args public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		
		// ??\???
		Scanner scan = new Scanner(System.in);
		scan.useDelimiter("\\r\\n");
		
		// ??????
		int count[];
		count = new int[26];
		while(scan.hasNext()) {
			String S = scan.nextLine();
			// ???????????????
			int sl = S.length();
			// ?°???????????????????
			String s = S.toLowerCase();
			// 1????????\???char??????????´?
			char[] charArray = s.toCharArray();
			for (char ch : charArray) {
				int CH = ch;
				// a-z?????°??????
				if(((CH-97)>=0) && ((CH-97)<26)){
					count[CH-97]++;
				}
			}
		}
		// ??????
		for (int i=0; i<26; i++) {
			int cords = i + 97;
			char c = (char)cords;
			System.out.println(c + " : " + count[i]);
		}

		
	}

} public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		
		// ??\???
		Scanner scan = new Scanner(System.in);
		scan.useDelimiter("\\r\\n");
		
		// ??????
		int count[];
		count = new int[26];
		while(scan.hasNext()) {
			String S = scan.nextLine();
			// ???????????????
			int sl = S.length();
			// ?°???????????????????
			String s = S.toLowerCase();
			// 1????????\???char??????????´?
			char[] charArray = s.toCharArray();
			for (char ch : charArray) {
				int CH = ch;
				// a-z?????°??????
				if(((CH-97)>=0) && ((CH-97)<26)){
					count[CH-97]++;
				}
			}
		}
		// ??????
		for (int i=0; i<26; i++) {
			int cords = i + 97;
			char c = (char)cords;
			System.out.println(c + " : " + count[i]);
		}

		
	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		
		// ??\???
		Scanner scan = new Scanner(System.in);
		scan.useDelimiter("\\r\\n");
		
		// ??????
		int count[];
		count = new int[26];
		while(scan.hasNext()) {
			String S = scan.nextLine();
			// ???????????????
			int sl = S.length();
			// ?°???????????????????
			String s = S.toLowerCase();
			// 1????????\???char??????????´?
			char[] charArray = s.toCharArray();
			for (char ch : charArray) {
				int CH = ch;
				// a-z?????°??????
				if(((CH-97)>=0) && ((CH-97)<26)){
					count[CH-97]++;
				}
			}
		}
		// ??????
		for (int i=0; i<26; i++) {
			int cords = i + 97;
			char c = (char)cords;
			System.out.println(c + " : " + count[i]);
		}

		
	}

}