import java.io.*;

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader input = new BufferedReader(new InputStreamReader(System.in));

		String sentence;
		int[] abc = new int[26];

		while ((sentence = input.readLine()) != null) {
			for (int i = 0; i < sentence.length(); i++) {
				char c = sentence.charAt(i);
				     c = Character.toLowerCase(c);
				char cc = 'a';
				for (int j = 0; j < abc.length; j++) {
					if (cc == c)
						abc[j]++;
					cc++;
				}
			}
		}

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

} import java.io.*; io.* java public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader input = new BufferedReader(new InputStreamReader(System.in));

		String sentence;
		int[] abc = new int[26];

		while ((sentence = input.readLine()) != null) {
			for (int i = 0; i < sentence.length(); i++) {
				char c = sentence.charAt(i);
				     c = Character.toLowerCase(c);
				char cc = 'a';
				for (int j = 0; j < abc.length; j++) {
					if (cc == c)
						abc[j]++;
					cc++;
				}
			}
		}

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

} Main public static void main(String[] args) throws IOException {
		BufferedReader input = new BufferedReader(new InputStreamReader(System.in));

		String sentence;
		int[] abc = new int[26];

		while ((sentence = input.readLine()) != null) {
			for (int i = 0; i < sentence.length(); i++) {
				char c = sentence.charAt(i);
				     c = Character.toLowerCase(c);
				char cc = 'a';
				for (int j = 0; j < abc.length; j++) {
					if (cc == c)
						abc[j]++;
					cc++;
				}
			}
		}

		char cc = 'a';
		for (int i = 0; i < abc.length; i++) {
			System.out.println(cc + " : " + abc[i]);
			cc++;
		}
	} main {
		BufferedReader input = new BufferedReader(new InputStreamReader(System.in));

		String sentence;
		int[] abc = new int[26];

		while ((sentence = input.readLine()) != null) {
			for (int i = 0; i < sentence.length(); i++) {
				char c = sentence.charAt(i);
				     c = Character.toLowerCase(c);
				char cc = 'a';
				for (int j = 0; j < abc.length; j++) {
					if (cc == c)
						abc[j]++;
					cc++;
				}
			}
		}

		char cc = 'a';
		for (int i = 0; i < abc.length; i++) {
			System.out.println(cc + " : " + abc[i]);
			cc++;
		}
	} BufferedReader input = new BufferedReader(new InputStreamReader(System.in)); input new BufferedReader(new InputStreamReader(System.in)) String sentence; sentence int[] abc = new int[26]; abc new int[26] 26 while ((sentence = input.readLine()) != null) {
			for (int i = 0; i < sentence.length(); i++) {
				char c = sentence.charAt(i);
				     c = Character.toLowerCase(c);
				char cc = 'a';
				for (int j = 0; j < abc.length; j++) {
					if (cc == c)
						abc[j]++;
					cc++;
				}
			}
		} (sentence = input.readLine()) != null (sentence = input.readLine()) sentence input.readLine() input.readLine input null {
			for (int i = 0; i < sentence.length(); i++) {
				char c = sentence.charAt(i);
				     c = Character.toLowerCase(c);
				char cc = 'a';
				for (int j = 0; j < abc.length; j++) {
					if (cc == c)
						abc[j]++;
					cc++;
				}
			}
		} for (int i = 0; i < sentence.length(); i++) {
				char c = sentence.charAt(i);
				     c = Character.toLowerCase(c);
				char cc = 'a';
				for (int j = 0; j < abc.length; j++) {
					if (cc == c)
						abc[j]++;
					cc++;
				}
			} int i = 0; int i = 0; i 0 i < sentence.length() i sentence.length() sentence.length sentence i++ i++ i {
				char c = sentence.charAt(i);
				     c = Character.toLowerCase(c);
				char cc = 'a';
				for (int j = 0; j < abc.length; j++) {
					if (cc == c)
						abc[j]++;
					cc++;
				}
			} {
				char c = sentence.charAt(i);
				     c = Character.toLowerCase(c);
				char cc = 'a';
				for (int j = 0; j < abc.length; j++) {
					if (cc == c)
						abc[j]++;
					cc++;
				}
			} char c = sentence.charAt(i); c sentence.charAt(i) sentence.charAt sentence i c = Character.toLowerCase(c) c Character.toLowerCase(c) Character.toLowerCase Character c char cc = 'a'; cc 'a' for (int j = 0; j < abc.length; j++) {
					if (cc == c)
						abc[j]++;
					cc++;
				} int j = 0; int j = 0; j 0 j < abc.length j abc.length abc abc.length j++ j++ j {
					if (cc == c)
						abc[j]++;
					cc++;
				} {
					if (cc == c)
						abc[j]++;
					cc++;
				} if (cc == c)
						abc[j]++; cc == c cc c abc[j]++ abc[j] abc j cc++ cc char cc = 'a'; cc 'a' for (int i = 0; i < abc.length; i++) {
			System.out.println(cc + " : " + abc[i]);
			cc++;
		} int i = 0; int i = 0; i 0 i < abc.length i abc.length abc abc.length i++ i++ i {
			System.out.println(cc + " : " + abc[i]);
			cc++;
		} {
			System.out.println(cc + " : " + abc[i]);
			cc++;
		} System.out.println(cc + " : " + abc[i]) System.out.println System.out System System.out cc + " : " + abc[i] cc + " : " + abc[i] cc " : " abc[i] abc i cc++ cc String[] args args public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader input = new BufferedReader(new InputStreamReader(System.in));

		String sentence;
		int[] abc = new int[26];

		while ((sentence = input.readLine()) != null) {
			for (int i = 0; i < sentence.length(); i++) {
				char c = sentence.charAt(i);
				     c = Character.toLowerCase(c);
				char cc = 'a';
				for (int j = 0; j < abc.length; j++) {
					if (cc == c)
						abc[j]++;
					cc++;
				}
			}
		}

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

} public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader input = new BufferedReader(new InputStreamReader(System.in));

		String sentence;
		int[] abc = new int[26];

		while ((sentence = input.readLine()) != null) {
			for (int i = 0; i < sentence.length(); i++) {
				char c = sentence.charAt(i);
				     c = Character.toLowerCase(c);
				char cc = 'a';
				for (int j = 0; j < abc.length; j++) {
					if (cc == c)
						abc[j]++;
					cc++;
				}
			}
		}

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

} Main
import java.io.*;

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader input = new BufferedReader(new InputStreamReader(System.in));

		String sentence;
		int[] abc = new int[26];

		while ((sentence = input.readLine()) != null) {
			for (int i = 0; i < sentence.length(); i++) {
				char c = sentence.charAt(i);
				     c = Character.toLowerCase(c);
				char cc = 'a';
				for (int j = 0; j < abc.length; j++) {
					if (cc == c)
						abc[j]++;
					cc++;
				}
			}
		}

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

}