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