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