#include <stdio.h>

int main()
{
  int N;
  char c;
  while (scanf("%d %c", &N, &c) != EOF) {
    int ret = N;

    if (c == 'K') {
      if(N == 1 )
	ret = 1;
      else {
	if (N%2 == 0 ) {
	  ret = N;
	}
	else {
	  ret = N + 1;
	}
      }
      
    }// K
    if(c == 'N') {
      if (N <=2 )
	ret = 1;
      else
	ret = 2;
    }
    
    printf("%d\n" ,ret);

  }
  return 0;
}