#include <bits/stdc++.h>
using namespace std;
void boost() {
  std::ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
}
void solve() {
  long long vladik, valera;
  cin >> vladik >> valera;
  long long cnt = 1;
  while (1) {
    if (cnt & 1) {
      if (vladik < cnt) {
        cout << "Vladik" << '\n';
        break;
      }
      vladik -= cnt++;
    } else {
      if (valera < cnt) {
        cout << "Valera" << '\n';
        break;
      }
      valera -= cnt++;
    }
  }
}
int main() {
  boost();
  solve();
  return 0;
}
