#include <bits/stdc++.h>
using namespace std;
int m[26];
int main() {
  float a, c, d, b;
  cin >> a >> b >> c >> d;
  float sa = max((3 * a) / 10.0, a - (a / 250.0) * c);
  float sb = max((3 * b) / 10.0, b - (b / 250.0) * d);
  if (sa > sb)
    cout << "Misha";
  else if (sb > sa)
    cout << "Vasya";
  else
    cout << "Tie";
  return 0;
}
