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 PHP (judge verdict: Accepted)

<?php
$A=[];
for($i=97;$i<123;$i++) $A[$i]=0;

while(1){
  $S=trim(fgets(STDIN));
  if(!$S){break;}

  foreach(str_split($S) as $c){
    $n=ord($c);
    if($n<65);
    elseif($n<91) ++$A[$n+32];
    elseif($n<97);
    elseif($n<123) ++$A[$n];
  }
}

for($i=97;$i<123;$i++) echo chr($i),' : ',$A[$i],PHP_EOL;