#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, d;
  cin >> a >> b >> c >> d;
  if (max((3 * a / 10), a - a / 250 * c) == max((3 * b / 10), b - b / 250 * d))
    cout << "Tie";
  else if (max((3 * a / 10), a - a / 250 * c) >
           max((3 * b / 10), b - b / 250 * d))
    cout << "Misha";
  else if (max((3 * a / 10), a - a / 250 * c) <
           max((3 * b / 10), b - b / 250 * d))
    cout << "Vasya";
  return 0;
}
