#include <bits/stdc++.h>
using namespace std;
void Solve() {
  long long int a, b;
  cin >> a >> b;
  int count_a = 0;
  int count_b = 0;
  int i = 1;
  int j = 2;
  while (a >= 0) {
    a = a - i;
    count_a++;
    i = i + 2;
  }
  while (b >= 0) {
    b = b - j;
    count_b++;
    j = j + 2;
  }
  if (count_a > count_b)
    cout << "Valera";
  else if (count_a == count_b)
    cout << "Vladik";
  else
    cout << "Vladik";
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  Solve();
  return 0;
}
