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: Accepted)

#include <stdio.h>

char a[20],b[20],c[20],d[30]="abcdefghijklmnopqrstuvwxyz",e[30]="ABCDEFGHIJKLMNOPQRSTUVWXYZ" ;
int x,y,z ;

int main(void){

    scanf ("%s%s%s",a,b,c) ;
    
    for (int i=0; i<30; i++ ){
        
        if ( a[0]==d[i] ){
            x = i ;
        }
        
        if ( b[0]==d[i] ){
            y = i ;
        }
        
        if ( c[0]==d[i] ){
            z = i ; 
        }
        
    }
    
    printf ("%c%c%c",e[x],e[y],e[z]) ;
    
    return 0 ;
    
}