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