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 C (judge verdict: Time Limit Exceeded)

#include <stdio.h>

int main(void){
	char string[1201];
	int i, count[26];
	for (i = 0; i < 26; i++) count[i] = 0;
	while(1){
		if (scanf("%s", string) == 0) break;
		for (i = 0; i < 1201; i++){
			if (string[i] == '\0') break;
			if ('A' <= string[i] && string[i] <= 'Z') string[i] += 'a' - 'A';
			if ('a' <= string[i] && string[i] <= 'z') count[string[i] - 'a']++;
		}
	}
	for (i = 0; i < 26; i++){
		printf("%c : %d\n", 'a' + i, count[i]);
	}
	return 0;
}