Problem:
Score : 100 points

Problem Statement

You are given three words s_1, s_2 and s_3, each composed of lowercase English letters, with spaces in between.
Print the acronym formed from the uppercased initial letters of the words.

Constraints

s_1, s_2 and s_3 are composed of lowercase English letters.

1 ≤ |s_i| ≤ 10 (1≤i≤3)

Input

Input is given from Standard Input in the following format:

s_1 s_2 s_3

Output

Print the answer.

Sample Input 1

atcoder beginner contest

Sample Output 1

ABC

The initial letters of atcoder, beginner and contest are a, b and c. Uppercase and concatenate them to obtain ABC.

Sample Input 2

resident register number

Sample Output 2

RRN

Sample Input 3

k nearest neighbor

Sample Output 3

KNN

Sample Input 4

async layered coding

Sample Output 4

ALC

Solution in PHP (5.6.30) (judge verdict: Accepted)

<?php
while($input = fgets(STDIN)){
    if(trim($input)){
        $tmp_array = explode(' ', trim($input));
        $array[] = $tmp_array[0];
        $array[] = $tmp_array[1];
        $array[] = $tmp_array[2];
    }
}

for ($i = 0; $i <count($array); $i++) {
    echo strtoupper(substr($array[$i], 0, 1));
}