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 (GCC 5.4.1) (judge verdict: Wrong Answer)

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

int main() {

    char a[10], b[10], c[10], sigla[3];

    scanf("%s %s %s", &a[1], &b[1], &c[1]);

    sigla[1] = toupper(a[1]);
    sigla[2] = toupper(b[1]);
    sigla[3] = toupper(c[1]);

    for (int i = 1; i <= 3; i++) {
        printf("%c", sigla[i]);
    }
    printf("\n");

    return 0;
}