#include <bits/stdc++.h>
using namespace std;
const long long MAXN = 2e6 + 10, inf = 1e18, mod = 1e9 + 7;
long long a, b;
void Read_input() { cin >> a >> b; }
void Solve() {
  long long cnt = 1;
  while (true) {
    if (a < cnt and cnt % 2) {
      cout << "Vladik";
      exit(0);
    }
    if (b < cnt and cnt % 2 == 0) {
      cout << "Valera";
      exit(0);
    }
    if (cnt % 2)
      a -= cnt;
    else
      b -= cnt;
    cnt++;
  }
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  Read_input(), Solve();
  return 0;
}
