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: Wrong Answer)

// ITP1_8_C Counting Characters
import java.io.*;

class Main {

   public static void main(String[] args) {
      try {
         BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
         String str;
         int[] alphabet = new int[26];
         while ((str = br.readLine()) != null) {
            str = str.toLowerCase();
            for (int i = 0; i < str.length(); i++) {
               char ch = str.charAt(i);
               if (ch >= 'a' && ch <= 'z')
                  alphabet[ch - 'a']++;
            }
            for (int i = 0; i < alphabet.length; i++) {
               System.out.println((char)('a' + i) + " : " + alphabet[i]);
            }
         }
      }

      catch (Exception e) {
         System.err.println(e);
      }
   }
}