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