#include <bits/stdc++.h>
using namespace std;
long long factor(long long a) {
  long long z = 1;
  for (long long i = 1; i <= a - 1; i++) {
    z *= i;
  }
  return z;
}
int t, a, b, c;
long long ap[100005], br[20000001] = {0};
int main() {
  ios_base::sync_with_stdio(false);
  int a, b, x = 1, y = 2;
  cin >> a >> b;
  while (a >= 0 && b >= 0) {
    a -= x;
    b -= y;
    x += 2;
    y += 2;
  }
  if (a < 0) {
    cout << "Vladik" << endl;
  } else if (b < 0) {
    cout << "Valera" << endl;
  }
}
