#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 * c) / 250);
  int v = max((3 * b) / 10, b - (b * d) / 250);
  if (m > v)
    cout << "Misha" << endl;
  else if (v > m)
    cout << "Vasya" << endl;
  else
    cout << "Tie" << endl;
  return 0;
}
