#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, d, m, v;
  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;
}
