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