import java.util.Scanner;

class Main{
       public static void main(String[] args){
    	Scanner scan = new Scanner(System.in);
    	String number;
    	String change;
    	
    	char[] ca;
    	int[] count = new int[26];
    	int num;
    	char alphabet = 'a';
    	
    	while(scan.hasNext()){
    		number = scan.nextLine();
        	change = number.toLowerCase();
        	ca = change.toCharArray();
        	
	    	for(int i = 0; i < ca.length; i++){
	    		num = ca[i] - 'a';
	    		if(num >= 0 && num < 26){
	    			count[num]++;
	    		}
	    	}
     	}
     		
    	
    	for(int i = 0; i < 26; i++){;
    		System.out.println(alphabet + " : " + count[i]);
    		alphabet += 1;
    	}
     }
} import java.util.Scanner; Scanner java.util class Main{
       public static void main(String[] args){
    	Scanner scan = new Scanner(System.in);
    	String number;
    	String change;
    	
    	char[] ca;
    	int[] count = new int[26];
    	int num;
    	char alphabet = 'a';
    	
    	while(scan.hasNext()){
    		number = scan.nextLine();
        	change = number.toLowerCase();
        	ca = change.toCharArray();
        	
	    	for(int i = 0; i < ca.length; i++){
	    		num = ca[i] - 'a';
	    		if(num >= 0 && num < 26){
	    			count[num]++;
	    		}
	    	}
     	}
     		
    	
    	for(int i = 0; i < 26; i++){;
    		System.out.println(alphabet + " : " + count[i]);
    		alphabet += 1;
    	}
     }
} Main public static void main(String[] args){
    	Scanner scan = new Scanner(System.in);
    	String number;
    	String change;
    	
    	char[] ca;
    	int[] count = new int[26];
    	int num;
    	char alphabet = 'a';
    	
    	while(scan.hasNext()){
    		number = scan.nextLine();
        	change = number.toLowerCase();
        	ca = change.toCharArray();
        	
	    	for(int i = 0; i < ca.length; i++){
	    		num = ca[i] - 'a';
	    		if(num >= 0 && num < 26){
	    			count[num]++;
	    		}
	    	}
     	}
     		
    	
    	for(int i = 0; i < 26; i++){;
    		System.out.println(alphabet + " : " + count[i]);
    		alphabet += 1;
    	}
     } main {
    	Scanner scan = new Scanner(System.in);
    	String number;
    	String change;
    	
    	char[] ca;
    	int[] count = new int[26];
    	int num;
    	char alphabet = 'a';
    	
    	while(scan.hasNext()){
    		number = scan.nextLine();
        	change = number.toLowerCase();
        	ca = change.toCharArray();
        	
	    	for(int i = 0; i < ca.length; i++){
	    		num = ca[i] - 'a';
	    		if(num >= 0 && num < 26){
	    			count[num]++;
	    		}
	    	}
     	}
     		
    	
    	for(int i = 0; i < 26; i++){;
    		System.out.println(alphabet + " : " + count[i]);
    		alphabet += 1;
    	}
     } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) String number; number String change; change char[] ca; ca int[] count = new int[26]; count new int[26] 26 int num; num char alphabet = 'a'; alphabet 'a' while(scan.hasNext()){
    		number = scan.nextLine();
        	change = number.toLowerCase();
        	ca = change.toCharArray();
        	
	    	for(int i = 0; i < ca.length; i++){
	    		num = ca[i] - 'a';
	    		if(num >= 0 && num < 26){
	    			count[num]++;
	    		}
	    	}
     	} scan.hasNext() scan.hasNext scan {
    		number = scan.nextLine();
        	change = number.toLowerCase();
        	ca = change.toCharArray();
        	
	    	for(int i = 0; i < ca.length; i++){
	    		num = ca[i] - 'a';
	    		if(num >= 0 && num < 26){
	    			count[num]++;
	    		}
	    	}
     	} number = scan.nextLine() number scan.nextLine() scan.nextLine scan change = number.toLowerCase() change number.toLowerCase() number.toLowerCase number ca = change.toCharArray() ca change.toCharArray() change.toCharArray change for(int i = 0; i < ca.length; i++){
	    		num = ca[i] - 'a';
	    		if(num >= 0 && num < 26){
	    			count[num]++;
	    		}
	    	} int i = 0; int i = 0; i 0 i < ca.length i ca.length ca ca.length i++ i++ i {
	    		num = ca[i] - 'a';
	    		if(num >= 0 && num < 26){
	    			count[num]++;
	    		}
	    	} {
	    		num = ca[i] - 'a';
	    		if(num >= 0 && num < 26){
	    			count[num]++;
	    		}
	    	} num = ca[i] - 'a' num ca[i] - 'a' ca[i] ca i 'a' if(num >= 0 && num < 26){
	    			count[num]++;
	    		} num >= 0 && num < 26 num >= 0 num 0 num < 26 num 26 {
	    			count[num]++;
	    		} count[num]++ count[num] count num for(int i = 0; i < 26; i++){;
    		System.out.println(alphabet + " : " + count[i]);
    		alphabet += 1;
    	} int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {;
    		System.out.println(alphabet + " : " + count[i]);
    		alphabet += 1;
    	} {;
    		System.out.println(alphabet + " : " + count[i]);
    		alphabet += 1;
    	} System.out.println(alphabet + " : " + count[i]) System.out.println System.out System System.out alphabet + " : " + count[i] alphabet + " : " + count[i] alphabet " : " count[i] count i alphabet += 1 alphabet 1 String[] args args
import java.util.Scanner;

class Main{
       public static void main(String[] args){
    	Scanner scan = new Scanner(System.in);
    	String number;
    	String change;
    	
    	char[] ca;
    	int[] count = new int[26];
    	int num;
    	char alphabet = 'a';
    	
    	while(scan.hasNext()){
    		number = scan.nextLine();
        	change = number.toLowerCase();
        	ca = change.toCharArray();
        	
	    	for(int i = 0; i < ca.length; i++){
	    		num = ca[i] - 'a';
	    		if(num >= 0 && num < 26){
	    			count[num]++;
	    		}
	    	}
     	}
     		
    	
    	for(int i = 0; i < 26; i++){;
    		System.out.println(alphabet + " : " + count[i]);
    		alphabet += 1;
    	}
     }
}