#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, d;
  scanf("%d %d %d %d", &a, &b, &c, &d);
  double pa, pb;
  pa = max(3 * a / 10.0, a - a / 250.0 * c);
  pb = max(3 * b / 10.0, b - b / 250.0 * d);
  if (pa > pb)
    printf("Misha\n");
  else if (pa < pb)
    printf("Vasya\n");
  else
    printf("Tie\n");
  return 0;
}
