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 C++14 (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>
#include <iostream>
#include <algorithm>
#include <deque>
#include <vector>
#include <set>
#include <string>
#include <queue>
#include <map>

#define REP(i, n) for(int i = 0; i < (int)(n); i++)

using namespace std;

int main(){
	string w1;
	string w2;
	string w3;
	while(cin >> w1){
		cin >> w2;
		cin >> w3;
		char a = w1[0];
		char b = w2[0];
		char c = w3[0];
    a += 'A' - 'a';
		b += 'A' - 'a';
		c += 'A' - 'a';
		cout << a << b << c << endl;
	}

	return 0;
}