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