#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, d;
  cin >> a >> b >> c >> d;
  int max1 = max((3 * a) / 10, (a - (a / 250) * c));
  int max2 = max((3 * b) / 10, (b - (b / 250) * d));
  if (max1 > max2)
    cout << "Misha";
  else if (max1 == max2)
    cout << "Tie";
  else
    cout << "Vasya";
}
