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