#include <bits/stdc++.h>
using namespace std;
void solve() {
  long long a, b;
  cin >> a >> b;
  long long x = 0;
  long long preva = 1;
  long long prevb = 2;
  while (true) {
    if (x % 2 == 0) {
      if (a >= preva) {
        a -= preva;
      } else {
        cout << "Vladik" << endl;
        return;
      }
      preva += 2;
    } else {
      if (b >= prevb) {
        b -= prevb;
      } else {
        cout << "Valera" << endl;
        return;
      }
      prevb += 2;
    }
    x++;
  }
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  long long t = 1;
  while (t--) solve();
  return 0;
}
