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// 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;
}