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

char str[3][10];

int len(char*);

int main(void){
    for(int i=0;i<3;i++){
        scanf("%s", str[i]);
        if(len(str[i])<1 || len(str[i])>10){
            printf("Error\n");
            return 0;
        }
        printf("%c", toupper(str[i][0]));

    }
    printf("\n");
    return 0;


}



int len(char arr[]){
    char* p = arr;
    int count=0;
    char end = '\0';
    while(strcmp(p,&end)){
        count++;
        p++;
    }
    return count;
}