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 9.2.1) (judge verdict: Accepted)

#include<string.h>
int main()
{
    char s1[10],s2[10],s3[10];
    int i;
    scanf("%s %s %s",&s1,&s2,&s3);

    for(i=0;i<10;i++){
    if('a'<=s1[i] && s1[i]<='z' && 'a'<=s2[i] && s2[i]<='z' && 'a'<=s3[i] && s3[i]<='z'){
       continue;

    }
    }
    s1[0]=s1[0]-32;
    s2[0]=s2[0]-32;
    s3[0]=s3[0]-32;
    printf("%c%c%c",s1[0],s2[0],s3[0]);
    return 0;
}