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