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