Problem:
Score : 100 points

Problem Statement

AtCoder Inc. holds a contest every Saturday.

There are two types of contests called ABC and ARC, and just one of them is held at a time.

The company holds these two types of contests alternately: an ARC follows an ABC and vice versa.

Given a string S representing the type of the contest held last week, print the string representing the type of the contest held this week.

Constraints

S is ABC or ARC.

Input

Input is given from Standard Input in the following format:

S

Output

Print the string representing the type of the contest held this week.

Sample Input 1

ABC

Sample Output 1

ARC

They held an ABC last week, so they will hold an ARC this week.

Solution in C (GCC 9.2.1) (judge verdict: Output Limit Exceeded)

#include <stdio.h>
int main (){
	int x; // jumlah angka bintang dan baris
	scanf("%d", &x);
	for (int l=1 ; l<=x ; l++ ){
		
		for (int z = x ; z>l ; --z){
			printf(" ");}
			
		for (int i = 0 ; i<l ; i++){
			printf("#");}
			
		printf("\n");
	}
return 0;
}