#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, d;
  scanf("%d %d %d %d", &a, &b, &c, &d);
  int m = max((3 * a) / 10, a - (a / 250) * c);
  int v = max((3 * b) / 10, b - (b / 250) * d);
  if (m > v)
    printf("Misha\n");
  else if (m < v)
    printf("Vasya\n");
  else
    printf("Tie\n");
}
