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