// taskA.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include <fstream>

int _tmain(int argc, _TCHAR* argv[])
{
	std::ifstream ifs("input.txt");
	int N, M, C=0;
	char ch;

	ifs >> N >> M >> ch;

	if (ch == 'S')
		C = M + 2;
	else if (ch == 'W')
		C = M + 1;
	if (C > N) C = N;

	std::cout << C <<std::endl;
	return 0;
}