/* -*- coding: utf-8 -*-
 *
 * 3279.cc:  No.3279 Dhole vs Monster - yukicoder
 */

#include<cstdio>
#include<cstring>
#include<algorithm>

using namespace std;

/* constant */

const int MAX_L = 5;
const int ds[MAX_L] = { 390, 429, 468, 507, 546 };

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int l;
  char s[16];
  scanf("%d%s", &l, s), l--;

  int x = (s[0] == 'B') ? ds[l + 1] : ds[l];
  printf("%d\n", x);

  return 0;
}