#include <bits/stdc++.h>
using namespace std;
int a, b, c, d;
void solve() {
  double m = max((3.0) * a / (10.0), (double)(a - a * c / 250));
  double v = max((3.0) * b / (10.0), (double)(b - b * d / 250));
  if (m > v) cout << "Misha" << endl;
  if (m == v) cout << "Tie" << endl;
  if (m < v) cout << "Vasya" << endl;
}
int main() {
  while (cin >> a >> b >> c >> d) {
    solve();
  }
  return 0;
}
