#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, d;
  cin >> a >> b >> c >> d;
  int cnt = max(3 * a / 10, (a - (a / 250) * c));
  int cnt1 = max(3 * b / 10, (b - (b / 250) * d));
  if (cnt > cnt1)
    cout << "Misha" << endl;
  else if (cnt < cnt1)
    cout << "Vasya" << endl;
  else
    cout << "Tie" << endl;
  return 0;
}
