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