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

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		char[] alpha = new char[] { '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[] countList = new int[alpha.length];

		String str;
		while((str = br.readLine())!= null){
			char[] input = str.toLowerCase().toCharArray();
			for(int i=0; i<input.length;i++){
				for(int j=0;j<alpha.length;j++){
					if(input[i]==alpha[j]){
						countList[j] +=1;
					}
				}
			}
		}

		for(int i=0;i<alpha.length;i++){
			System.out.println(alpha[i] + " : " + countList[i]);
		}
	}
} 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 void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		char[] alpha = new char[] { '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[] countList = new int[alpha.length];

		String str;
		while((str = br.readLine())!= null){
			char[] input = str.toLowerCase().toCharArray();
			for(int i=0; i<input.length;i++){
				for(int j=0;j<alpha.length;j++){
					if(input[i]==alpha[j]){
						countList[j] +=1;
					}
				}
			}
		}

		for(int i=0;i<alpha.length;i++){
			System.out.println(alpha[i] + " : " + countList[i]);
		}
	}
} Main public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		char[] alpha = new char[] { '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[] countList = new int[alpha.length];

		String str;
		while((str = br.readLine())!= null){
			char[] input = str.toLowerCase().toCharArray();
			for(int i=0; i<input.length;i++){
				for(int j=0;j<alpha.length;j++){
					if(input[i]==alpha[j]){
						countList[j] +=1;
					}
				}
			}
		}

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

		String str;
		while((str = br.readLine())!= null){
			char[] input = str.toLowerCase().toCharArray();
			for(int i=0; i<input.length;i++){
				for(int j=0;j<alpha.length;j++){
					if(input[i]==alpha[j]){
						countList[j] +=1;
					}
				}
			}
		}

		for(int i=0;i<alpha.length;i++){
			System.out.println(alpha[i] + " : " + countList[i]);
		}
	} BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) char[] alpha = new char[] { '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' }; alpha new char[] { '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[] countList = new int[alpha.length]; countList new int[alpha.length] alpha.length alpha alpha.length String str; str while((str = br.readLine())!= null){
			char[] input = str.toLowerCase().toCharArray();
			for(int i=0; i<input.length;i++){
				for(int j=0;j<alpha.length;j++){
					if(input[i]==alpha[j]){
						countList[j] +=1;
					}
				}
			}
		} (str = br.readLine())!= null (str = br.readLine()) str br.readLine() br.readLine br null {
			char[] input = str.toLowerCase().toCharArray();
			for(int i=0; i<input.length;i++){
				for(int j=0;j<alpha.length;j++){
					if(input[i]==alpha[j]){
						countList[j] +=1;
					}
				}
			}
		} char[] input = str.toLowerCase().toCharArray(); input str.toLowerCase().toCharArray() str.toLowerCase().toCharArray str.toLowerCase() str.toLowerCase str for(int i=0; i<input.length;i++){
				for(int j=0;j<alpha.length;j++){
					if(input[i]==alpha[j]){
						countList[j] +=1;
					}
				}
			} int i=0; int i=0; i 0 i<input.length i input.length input input.length i++ i++ i {
				for(int j=0;j<alpha.length;j++){
					if(input[i]==alpha[j]){
						countList[j] +=1;
					}
				}
			} {
				for(int j=0;j<alpha.length;j++){
					if(input[i]==alpha[j]){
						countList[j] +=1;
					}
				}
			} for(int j=0;j<alpha.length;j++){
					if(input[i]==alpha[j]){
						countList[j] +=1;
					}
				} int j=0; int j=0; j 0 j<alpha.length j alpha.length alpha alpha.length j++ j++ j {
					if(input[i]==alpha[j]){
						countList[j] +=1;
					}
				} {
					if(input[i]==alpha[j]){
						countList[j] +=1;
					}
				} if(input[i]==alpha[j]){
						countList[j] +=1;
					} input[i]==alpha[j] input[i] input i alpha[j] alpha j {
						countList[j] +=1;
					} countList[j] +=1 countList[j] countList j 1 for(int i=0;i<alpha.length;i++){
			System.out.println(alpha[i] + " : " + countList[i]);
		} int i=0; int i=0; i 0 i<alpha.length i alpha.length alpha alpha.length i++ i++ i {
			System.out.println(alpha[i] + " : " + countList[i]);
		} {
			System.out.println(alpha[i] + " : " + countList[i]);
		} System.out.println(alpha[i] + " : " + countList[i]) System.out.println System.out System System.out alpha[i] + " : " + countList[i] alpha[i] + " : " + countList[i] alpha[i] alpha i " : " countList[i] countList i String[] args args public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		char[] alpha = new char[] { '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[] countList = new int[alpha.length];

		String str;
		while((str = br.readLine())!= null){
			char[] input = str.toLowerCase().toCharArray();
			for(int i=0; i<input.length;i++){
				for(int j=0;j<alpha.length;j++){
					if(input[i]==alpha[j]){
						countList[j] +=1;
					}
				}
			}
		}

		for(int i=0;i<alpha.length;i++){
			System.out.println(alpha[i] + " : " + countList[i]);
		}
	}
} public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		char[] alpha = new char[] { '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[] countList = new int[alpha.length];

		String str;
		while((str = br.readLine())!= null){
			char[] input = str.toLowerCase().toCharArray();
			for(int i=0; i<input.length;i++){
				for(int j=0;j<alpha.length;j++){
					if(input[i]==alpha[j]){
						countList[j] +=1;
					}
				}
			}
		}

		for(int i=0;i<alpha.length;i++){
			System.out.println(alpha[i] + " : " + countList[i]);
		}
	}
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		char[] alpha = new char[] { '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[] countList = new int[alpha.length];

		String str;
		while((str = br.readLine())!= null){
			char[] input = str.toLowerCase().toCharArray();
			for(int i=0; i<input.length;i++){
				for(int j=0;j<alpha.length;j++){
					if(input[i]==alpha[j]){
						countList[j] +=1;
					}
				}
			}
		}

		for(int i=0;i<alpha.length;i++){
			System.out.println(alpha[i] + " : " + countList[i]);
		}
	}
}