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 3.8.0) (judge verdict: Wrong Answer)

#include <stdio.h>
#include <ctype.h>

main()
{
	char s1[10], s2[10], s3[10], ans[4];
	
	int i;
	
	scanf("%s %s %s", s1, s2, s3);
	
	ans[0] = s1[0];
	ans[1] = s2[0];
	ans[2] = s3[0];
	
	for(i = 0; ans[i] != '\0'; i++)
	{ ans[i] = (char)toupper(ans[i]);}
	
	printf("%s\n", ans);
	
	return 0;
	
}