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 ch;
    int num[26] = {0};
    int i;
    while(1){
        scanf("%c",&ch);
        if(ch==46){
            break;
        }else{
            for(i=0;i<25;i++){
                if(ch==i+65){
                    num[i]++;
                    break;
                }else if(ch==i+97){
                    num[i]++;
                    break;
                }
            }
        }
    }
    for(i=0;i<26;i++){
        printf("%c : %d\n",i+97,num[i]);
    }
    return 0; /*0?????????*/
}