#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";
  } else if (y > x) {
    cout << "Vasya";
  } else {
    cout << "Tie";
  }
}
