Problem:
Counting Characters

Write a program which counts and reports the number of each alphabetical letter. Ignore the case of characters.

Input

A sentence in English is given in several lines.

Output

Prints the number of alphabetical letters in the following format:

a : The number of 'a'
b : The number of 'b'
c : The number of 'c'
.
.
z : The number of 'z'

Constraints

The number of characters in the sentence < 1200

Sample Input

This is a pen.

Sample Output

a : 1
b : 0
c : 0
d : 0
e : 1
f : 0
g : 0
h : 1
i : 2
j : 0
k : 0
l : 0
m : 0
n : 1
o : 0
p : 1
q : 0
r : 0
s : 2
t : 1
u : 0
v : 0
w : 0
x : 0
y : 0
z : 0

Solution in JAVA (judge verdict: Accepted)

import java.util.Scanner;

class Main{
    
    public static void main(String[] args){
        
        Scanner sc =new Scanner(System.in);
        
        int a[]=new int[26];
        
        while(sc.hasNextLine()){
        
        String S = sc.nextLine();
        
        for(int i = 0; i < S.length(); i++) {
        
		 char c = S.charAt(i);
		 
		 if('a'<= c&&c<='z')
          a[c-'a']++;
          
          if('A'<= c&&c<='Z')
          a[c-'A']++;
         
         }
         
         }
            
        for(int i=0;i<26;i++)    
        System.out.printf("%c : %d\n",'a'+i,a[i]);
}
}