#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, d;
  cin >> a >> b >> c >> d;
  int p1 = max((3 * a) / 10, a - ((a / 250) * c));
  int p2 = max((3 * b) / 10, b - ((b / 250) * d));
  if (p1 == p2)
    cout << "Tie" << endl;
  else if (p1 > p2)
    cout << "Misha" << endl;
  else
    cout << "Vasya" << endl;
}
