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 Kotlin (judge verdict: Accepted)

import java.util.Scanner

fun main(args:Array<String>){

    val cin = Scanner(System.`in`)
    var result = Array<Int>(26,{0})

    while(cin.hasNext()){
        var str = cin.nextLine()
	    str = str.toLowerCase()

	    for(i in 0..str.length-1){
	        if(str[i] >= 'a' && str[i] <= 'z'){
	            val x = str[i].toInt() - 'a'.toInt() 
	            result[x] = result[x] + 1
	        }
	    }
    }

    for(i in 'a'..'z'){	
	println("$i : ${result[i.toInt() - 'a'.toInt()]}")
    } 
	
}