#include <bits/stdc++.h>
using namespace std;
int main() {
  double a, b, c, d, v, m;
  cin >> a >> b >> c >> d;
  m = max((3 * a) / 10, a - ((a / 250) * c));
  v = max((3 * b) / 10, b - ((b / 250) * d));
  if (m > v) {
    cout << "Misha" << endl;
  } else if (v > m) {
    cout << "Vasya" << endl;
  } else {
    cout << "Tie" << endl;
  }
  return 0;
}
