#include <bits/stdc++.h>
using namespace std;
map<long long, long long> frequency(vector<long long> v) {
  map<long long, long long> m;
  for (long long i = 0; i < v.size(); i++) {
    if (m.find(v[i]) != m.end())
      m[v[i]]++;
    else {
      m.insert({v[i], 1});
    }
  }
  return m;
}
void input(vector<long long>& v, long long n) {
  for (long long i = 0; i < (long long)(n); i++) {
    long long in;
    cin >> in;
    v.push_back(in);
  }
}
void output(vector<long long> v) {
  for (long long i = 0; i < (long long)(v.size()); i++) cout << v[i] << " ";
}
void solve() {
  long long a, b, c, d;
  cin >> a >> b >> c >> d;
  long long m = max((3 * a) / 10, a - (a / 250) * c);
  long long v = max((3 * b) / 10, b - (b / 250) * d);
  if (m > v) {
    cout << "Misha" << endl;
  } else if (v > m) {
    cout << "Vasya" << endl;
  } else {
    cout << "Tie" << endl;
  }
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  solve();
  return 0;
}
