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 (Clang 10.0.0) (judge verdict: Accepted)

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

int main(void) {
	char a[32], b[32], c[32];
	char buf[128], *ch;
	int diff = (int)('A') - (int)('a');

	fgets(buf, sizeof(buf), stdin);
	ch = strtok(buf, " ");
	sprintf(a, "%s", ch);
	ch = strtok(NULL, " ");
	sprintf(b, "%s", ch);
	ch = strtok(NULL, " ");
	sprintf(c, "%s", ch);

	printf("%c%c%c\n", (char)((int)a[0] + diff), (char)((int)b[0] + diff), (char)((int)c[0]) + diff);

	return 0;
}