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 PHP7 (7.0.15) (judge verdict: Accepted)

<?php
    /*
        Problem URL : http://abc059.contest.atcoder.jp/tasks/abc059_a

        Score  :
        Result :
        Time   : ms
        Memory : KB
     */

    ini_set('error_reporting', E_ALL & ~E_NOTICE);

    // define('DEBUG', true);
    define('DEBUG', false);

    if (DEBUG) {
        $start = microtime(true);
    }

    $a = explode(" ", trim(fgets(STDIN)));

    foreach ($a as $str) {
        echo strtoupper(substr($str, 0, 1));
    }
    echo PHP_EOL;