import java.util.*;
import java.lang.*;
import java.awt.*;

class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int[] t = new int[26];
		
		while (sc.hasNext()) {
			String s = sc.nextLine();
			for (int i = 0; i<s.length(); i++){
				int countval = s.toLowerCase().codePointAt(i)-97;
				if (countval >= 0) t[countval]++;
				
			}
		}
		
		for (int a=0; a<t.length;a++) {
			System.out.println(String.format("%s : %d", (char)(a+97), t[a]));	
		}
		
		
		
		
	}
} import java.util.*; util.* java import java.lang.*; lang.* java import java.awt.*; awt.* java class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int[] t = new int[26];
		
		while (sc.hasNext()) {
			String s = sc.nextLine();
			for (int i = 0; i<s.length(); i++){
				int countval = s.toLowerCase().codePointAt(i)-97;
				if (countval >= 0) t[countval]++;
				
			}
		}
		
		for (int a=0; a<t.length;a++) {
			System.out.println(String.format("%s : %d", (char)(a+97), t[a]));	
		}
		
		
		
		
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int[] t = new int[26];
		
		while (sc.hasNext()) {
			String s = sc.nextLine();
			for (int i = 0; i<s.length(); i++){
				int countval = s.toLowerCase().codePointAt(i)-97;
				if (countval >= 0) t[countval]++;
				
			}
		}
		
		for (int a=0; a<t.length;a++) {
			System.out.println(String.format("%s : %d", (char)(a+97), t[a]));	
		}
		
		
		
		
	} main {
		Scanner sc = new Scanner(System.in);
		
		int[] t = new int[26];
		
		while (sc.hasNext()) {
			String s = sc.nextLine();
			for (int i = 0; i<s.length(); i++){
				int countval = s.toLowerCase().codePointAt(i)-97;
				if (countval >= 0) t[countval]++;
				
			}
		}
		
		for (int a=0; a<t.length;a++) {
			System.out.println(String.format("%s : %d", (char)(a+97), t[a]));	
		}
		
		
		
		
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] t = new int[26]; t new int[26] 26 while (sc.hasNext()) {
			String s = sc.nextLine();
			for (int i = 0; i<s.length(); i++){
				int countval = s.toLowerCase().codePointAt(i)-97;
				if (countval >= 0) t[countval]++;
				
			}
		} sc.hasNext() sc.hasNext sc {
			String s = sc.nextLine();
			for (int i = 0; i<s.length(); i++){
				int countval = s.toLowerCase().codePointAt(i)-97;
				if (countval >= 0) t[countval]++;
				
			}
		} String s = sc.nextLine(); s sc.nextLine() sc.nextLine sc for (int i = 0; i<s.length(); i++){
				int countval = s.toLowerCase().codePointAt(i)-97;
				if (countval >= 0) t[countval]++;
				
			} int i = 0; int i = 0; i 0 i<s.length() i s.length() s.length s i++ i++ i {
				int countval = s.toLowerCase().codePointAt(i)-97;
				if (countval >= 0) t[countval]++;
				
			} {
				int countval = s.toLowerCase().codePointAt(i)-97;
				if (countval >= 0) t[countval]++;
				
			} int countval = s.toLowerCase().codePointAt(i)-97; countval s.toLowerCase().codePointAt(i)-97 s.toLowerCase().codePointAt(i) s.toLowerCase().codePointAt s.toLowerCase() s.toLowerCase s i 97 if (countval >= 0) t[countval]++; countval >= 0 countval 0 t[countval]++ t[countval] t countval for (int a=0; a<t.length;a++) {
			System.out.println(String.format("%s : %d", (char)(a+97), t[a]));	
		} int a=0; int a=0; a 0 a<t.length a t.length t t.length a++ a++ a {
			System.out.println(String.format("%s : %d", (char)(a+97), t[a]));	
		} {
			System.out.println(String.format("%s : %d", (char)(a+97), t[a]));	
		} System.out.println(String.format("%s : %d", (char)(a+97), t[a])) System.out.println System.out System System.out String.format("%s : %d", (char)(a+97), t[a]) String.format String "%s : %d" (char)(a+97) a 97 t[a] t a String[] args args
import java.util.*;
import java.lang.*;
import java.awt.*;

class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int[] t = new int[26];
		
		while (sc.hasNext()) {
			String s = sc.nextLine();
			for (int i = 0; i<s.length(); i++){
				int countval = s.toLowerCase().codePointAt(i)-97;
				if (countval >= 0) t[countval]++;
				
			}
		}
		
		for (int a=0; a<t.length;a++) {
			System.out.println(String.format("%s : %d", (char)(a+97), t[a]));	
		}
		
		
		
		
	}
}
