#include <bits/stdc++.h>
using namespace std;
const int INF = 1e9 + 7;
string nam[2] = {"Valera", "Vladik"};
int main() {
  int a[2], cur = 0;
  cin >> a[0] >> a[1];
  while (1) {
    int &C = a[cur % 2];
    cur++;
    if (C >= cur)
      C -= cur;
    else {
      cout << nam[cur % 2];
      return 0;
    }
  }
}
