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.io.*;
import java.util.Scanner;

public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    String s;
    char a;
    int cnt[];
    cnt=new int[26];
    while(true){
      s=sc.next();
      s=s.toLowerCase();
      for(int i=0;i<s.length();i++){
        a=s.charAt(i);
        if(a>='a' && a<='z') cnt[a-'a']++;
      }
      if(!(sc.hasNext())) break;
    }
    char abc='a';
    for(int i=0;i<26;i++){
      System.out.println((char)(abc+i)+" : "+cnt[i]);
    }
  }
}