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 JavaScript (judge verdict: Accepted)

const input = require('fs').readFileSync('/dev/stdin', 'utf8');
const alphabets = 'abcdefghijklmnopqrstuvwxyz'.split('');
let num = [];
let tmp = input.toLowerCase();
let str = tmp.split('')
for (let i = 0; i < alphabets.length; i++) {
    let cnt = 0;
    for (let j = 0; j < str.length; j++) {
        if (str[j] === alphabets[i]) {
            cnt++;
        }
    }
    num.push(cnt);
}

for  (i = 0; i < alphabets.length; i++) {
  console.log(alphabets[i] + " : " + num[i]);
}