#include <bits/stdc++.h>
using namespace std;
int main() {
  int vladik, valera, i = 1;
  cin >> vladik >> valera;
  while (1) {
    if (i % 2) {
      vladik -= i;
      if (vladik < 0) {
        cout << "Vladik";
        return 0;
      }
    } else {
      valera -= i;
      if (valera < 0) {
        cout << "Valera";
        return 0;
      }
    }
    i++;
  }
}
