import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static int[] charCount = new int[26];

	public static void main(String... args) throws IOException {
		final StringBuilder sb = new StringBuilder();
		final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			final int charactor = br.read();
			if (97 <= charactor && charactor <= 123) {
				charCount[charactor - 97]++;
			} else if (65 <= charactor && charactor <= 91) {
				charCount[charactor - 65]++;
			} else if (charactor == -1) {
				break;
			}
		}

		for (int i = 0; i < 26; i++) {
			sb.append(((char) (i + 97))).append(" : ").append(charCount[i]).append(i != 25 ? '\n' : "");
		}

		System.out.println(sb);
	}
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {
	public static int[] charCount = new int[26];

	public static void main(String... args) throws IOException {
		final StringBuilder sb = new StringBuilder();
		final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			final int charactor = br.read();
			if (97 <= charactor && charactor <= 123) {
				charCount[charactor - 97]++;
			} else if (65 <= charactor && charactor <= 91) {
				charCount[charactor - 65]++;
			} else if (charactor == -1) {
				break;
			}
		}

		for (int i = 0; i < 26; i++) {
			sb.append(((char) (i + 97))).append(" : ").append(charCount[i]).append(i != 25 ? '\n' : "");
		}

		System.out.println(sb);
	}
} Main public static int[] charCount = new int[26]; charCount new int[26] 26 public static void main(String... args) throws IOException {
		final StringBuilder sb = new StringBuilder();
		final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			final int charactor = br.read();
			if (97 <= charactor && charactor <= 123) {
				charCount[charactor - 97]++;
			} else if (65 <= charactor && charactor <= 91) {
				charCount[charactor - 65]++;
			} else if (charactor == -1) {
				break;
			}
		}

		for (int i = 0; i < 26; i++) {
			sb.append(((char) (i + 97))).append(" : ").append(charCount[i]).append(i != 25 ? '\n' : "");
		}

		System.out.println(sb);
	} main {
		final StringBuilder sb = new StringBuilder();
		final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			final int charactor = br.read();
			if (97 <= charactor && charactor <= 123) {
				charCount[charactor - 97]++;
			} else if (65 <= charactor && charactor <= 91) {
				charCount[charactor - 65]++;
			} else if (charactor == -1) {
				break;
			}
		}

		for (int i = 0; i < 26; i++) {
			sb.append(((char) (i + 97))).append(" : ").append(charCount[i]).append(i != 25 ? '\n' : "");
		}

		System.out.println(sb);
	} final StringBuilder sb = new StringBuilder(); sb new StringBuilder() final BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) while (true) {
			final int charactor = br.read();
			if (97 <= charactor && charactor <= 123) {
				charCount[charactor - 97]++;
			} else if (65 <= charactor && charactor <= 91) {
				charCount[charactor - 65]++;
			} else if (charactor == -1) {
				break;
			}
		} true {
			final int charactor = br.read();
			if (97 <= charactor && charactor <= 123) {
				charCount[charactor - 97]++;
			} else if (65 <= charactor && charactor <= 91) {
				charCount[charactor - 65]++;
			} else if (charactor == -1) {
				break;
			}
		} final int charactor = br.read(); charactor br.read() br.read br if (97 <= charactor && charactor <= 123) {
				charCount[charactor - 97]++;
			} else if (65 <= charactor && charactor <= 91) {
				charCount[charactor - 65]++;
			} else if (charactor == -1) {
				break;
			} 97 <= charactor && charactor <= 123 97 <= charactor 97 charactor charactor <= 123 charactor 123 {
				charCount[charactor - 97]++;
			} charCount[charactor - 97]++ charCount[charactor - 97] charCount charactor - 97 charactor 97 if (65 <= charactor && charactor <= 91) {
				charCount[charactor - 65]++;
			} else if (charactor == -1) {
				break;
			} 65 <= charactor && charactor <= 91 65 <= charactor 65 charactor charactor <= 91 charactor 91 {
				charCount[charactor - 65]++;
			} charCount[charactor - 65]++ charCount[charactor - 65] charCount charactor - 65 charactor 65 if (charactor == -1) {
				break;
			} charactor == -1 charactor -1 1 {
				break;
			} break; for (int i = 0; i < 26; i++) {
			sb.append(((char) (i + 97))).append(" : ").append(charCount[i]).append(i != 25 ? '\n' : "");
		} int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
			sb.append(((char) (i + 97))).append(" : ").append(charCount[i]).append(i != 25 ? '\n' : "");
		} {
			sb.append(((char) (i + 97))).append(" : ").append(charCount[i]).append(i != 25 ? '\n' : "");
		} sb.append(((char) (i + 97))).append(" : ").append(charCount[i]).append(i != 25 ? '\n' : "") sb.append(((char) (i + 97))).append(" : ").append(charCount[i]).append sb.append(((char) (i + 97))).append(" : ").append(charCount[i]) sb.append(((char) (i + 97))).append(" : ").append sb.append(((char) (i + 97))).append(" : ") sb.append(((char) (i + 97))).append sb.append(((char) (i + 97))) sb.append sb ((char) (i + 97)) i 97 " : " charCount[i] charCount i i != 25 ? '\n' : "" i != 25 i 25 '\n' "" System.out.println(sb) System.out.println System.out System System.out sb String... args args public class Main {
	public static int[] charCount = new int[26];

	public static void main(String... args) throws IOException {
		final StringBuilder sb = new StringBuilder();
		final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			final int charactor = br.read();
			if (97 <= charactor && charactor <= 123) {
				charCount[charactor - 97]++;
			} else if (65 <= charactor && charactor <= 91) {
				charCount[charactor - 65]++;
			} else if (charactor == -1) {
				break;
			}
		}

		for (int i = 0; i < 26; i++) {
			sb.append(((char) (i + 97))).append(" : ").append(charCount[i]).append(i != 25 ? '\n' : "");
		}

		System.out.println(sb);
	}
} public class Main {
	public static int[] charCount = new int[26];

	public static void main(String... args) throws IOException {
		final StringBuilder sb = new StringBuilder();
		final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			final int charactor = br.read();
			if (97 <= charactor && charactor <= 123) {
				charCount[charactor - 97]++;
			} else if (65 <= charactor && charactor <= 91) {
				charCount[charactor - 65]++;
			} else if (charactor == -1) {
				break;
			}
		}

		for (int i = 0; i < 26; i++) {
			sb.append(((char) (i + 97))).append(" : ").append(charCount[i]).append(i != 25 ? '\n' : "");
		}

		System.out.println(sb);
	}
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static int[] charCount = new int[26];

	public static void main(String... args) throws IOException {
		final StringBuilder sb = new StringBuilder();
		final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			final int charactor = br.read();
			if (97 <= charactor && charactor <= 123) {
				charCount[charactor - 97]++;
			} else if (65 <= charactor && charactor <= 91) {
				charCount[charactor - 65]++;
			} else if (charactor == -1) {
				break;
			}
		}

		for (int i = 0; i < 26; i++) {
			sb.append(((char) (i + 97))).append(" : ").append(charCount[i]).append(i != 25 ? '\n' : "");
		}

		System.out.println(sb);
	}
}