import java.util.Scanner;
public class Main {
    public static void main (String[] args) {
	Scanner scan = new Scanner(System.in);
	int[] alpabetDict = new int[26];
	while (scan.hasNext()) {
	    String input = scan.nextLine();
	    char[] inputArray = input.toCharArray();
	    int count = 0;
	    for (int i = 0; i < inputArray.length; i++) {
		if (Character.isLetter(inputArray[i])) {
		    alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a']++;
		}
	    }
	}
	for (int i = 0; i < 26; i++) {
	    System.out.println((char)(i+'a') + " : " + alpabetDict[i]);
	}
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main (String[] args) {
	Scanner scan = new Scanner(System.in);
	int[] alpabetDict = new int[26];
	while (scan.hasNext()) {
	    String input = scan.nextLine();
	    char[] inputArray = input.toCharArray();
	    int count = 0;
	    for (int i = 0; i < inputArray.length; i++) {
		if (Character.isLetter(inputArray[i])) {
		    alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a']++;
		}
	    }
	}
	for (int i = 0; i < 26; i++) {
	    System.out.println((char)(i+'a') + " : " + alpabetDict[i]);
	}
    }
} Main public static void main (String[] args) {
	Scanner scan = new Scanner(System.in);
	int[] alpabetDict = new int[26];
	while (scan.hasNext()) {
	    String input = scan.nextLine();
	    char[] inputArray = input.toCharArray();
	    int count = 0;
	    for (int i = 0; i < inputArray.length; i++) {
		if (Character.isLetter(inputArray[i])) {
		    alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a']++;
		}
	    }
	}
	for (int i = 0; i < 26; i++) {
	    System.out.println((char)(i+'a') + " : " + alpabetDict[i]);
	}
    } main {
	Scanner scan = new Scanner(System.in);
	int[] alpabetDict = new int[26];
	while (scan.hasNext()) {
	    String input = scan.nextLine();
	    char[] inputArray = input.toCharArray();
	    int count = 0;
	    for (int i = 0; i < inputArray.length; i++) {
		if (Character.isLetter(inputArray[i])) {
		    alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a']++;
		}
	    }
	}
	for (int i = 0; i < 26; i++) {
	    System.out.println((char)(i+'a') + " : " + alpabetDict[i]);
	}
    } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int[] alpabetDict = new int[26]; alpabetDict new int[26] 26 while (scan.hasNext()) {
	    String input = scan.nextLine();
	    char[] inputArray = input.toCharArray();
	    int count = 0;
	    for (int i = 0; i < inputArray.length; i++) {
		if (Character.isLetter(inputArray[i])) {
		    alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a']++;
		}
	    }
	} scan.hasNext() scan.hasNext scan {
	    String input = scan.nextLine();
	    char[] inputArray = input.toCharArray();
	    int count = 0;
	    for (int i = 0; i < inputArray.length; i++) {
		if (Character.isLetter(inputArray[i])) {
		    alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a']++;
		}
	    }
	} String input = scan.nextLine(); input scan.nextLine() scan.nextLine scan char[] inputArray = input.toCharArray(); inputArray input.toCharArray() input.toCharArray input int count = 0; count 0 for (int i = 0; i < inputArray.length; i++) {
		if (Character.isLetter(inputArray[i])) {
		    alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a']++;
		}
	    } int i = 0; int i = 0; i 0 i < inputArray.length i inputArray.length inputArray inputArray.length i++ i++ i {
		if (Character.isLetter(inputArray[i])) {
		    alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a']++;
		}
	    } {
		if (Character.isLetter(inputArray[i])) {
		    alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a']++;
		}
	    } if (Character.isLetter(inputArray[i])) {
		    alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a']++;
		} Character.isLetter(inputArray[i]) Character.isLetter Character inputArray[i] inputArray i {
		    alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a']++;
		} alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a']++ alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a'] alpabetDict (int)Character.toLowerCase(inputArray[i]) - 'a' (int)Character.toLowerCase(inputArray[i]) Character.toLowerCase Character inputArray[i] inputArray i 'a' for (int i = 0; i < 26; i++) {
	    System.out.println((char)(i+'a') + " : " + alpabetDict[i]);
	} int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
	    System.out.println((char)(i+'a') + " : " + alpabetDict[i]);
	} {
	    System.out.println((char)(i+'a') + " : " + alpabetDict[i]);
	} System.out.println((char)(i+'a') + " : " + alpabetDict[i]) System.out.println System.out System System.out (char)(i+'a') + " : " + alpabetDict[i] (char)(i+'a') + " : " + alpabetDict[i] (char)(i+'a') i 'a' " : " alpabetDict[i] alpabetDict i String[] args args public class Main {
    public static void main (String[] args) {
	Scanner scan = new Scanner(System.in);
	int[] alpabetDict = new int[26];
	while (scan.hasNext()) {
	    String input = scan.nextLine();
	    char[] inputArray = input.toCharArray();
	    int count = 0;
	    for (int i = 0; i < inputArray.length; i++) {
		if (Character.isLetter(inputArray[i])) {
		    alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a']++;
		}
	    }
	}
	for (int i = 0; i < 26; i++) {
	    System.out.println((char)(i+'a') + " : " + alpabetDict[i]);
	}
    }
} public class Main {
    public static void main (String[] args) {
	Scanner scan = new Scanner(System.in);
	int[] alpabetDict = new int[26];
	while (scan.hasNext()) {
	    String input = scan.nextLine();
	    char[] inputArray = input.toCharArray();
	    int count = 0;
	    for (int i = 0; i < inputArray.length; i++) {
		if (Character.isLetter(inputArray[i])) {
		    alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a']++;
		}
	    }
	}
	for (int i = 0; i < 26; i++) {
	    System.out.println((char)(i+'a') + " : " + alpabetDict[i]);
	}
    }
} Main
import java.util.Scanner;
public class Main {
    public static void main (String[] args) {
	Scanner scan = new Scanner(System.in);
	int[] alpabetDict = new int[26];
	while (scan.hasNext()) {
	    String input = scan.nextLine();
	    char[] inputArray = input.toCharArray();
	    int count = 0;
	    for (int i = 0; i < inputArray.length; i++) {
		if (Character.isLetter(inputArray[i])) {
		    alpabetDict[(int)Character.toLowerCase(inputArray[i]) - 'a']++;
		}
	    }
	}
	for (int i = 0; i < 26; i++) {
	    System.out.println((char)(i+'a') + " : " + alpabetDict[i]);
	}
    }
}