void print_chunk_pattern(int64_t x, int64_t z) {
  int64_t seed = (x*341873128712LL + z*132897987541LL)^0x5DEECE66DLL;

  for(int a = 0; a < 16; ++a) {
    for(int b = 0; b < 16; ++b) {
      seed = seed*709490313259657689LL + 1748772144486964054LL;

      seed = seed & ((1LL << 48LL) - 1LL);

      if(4 <= (seed >> 17) % 5) {
        printf("1,");
      } else {
        printf("0,");
      }

      seed = seed*5985058416696778513LL + -8542997297661424380LL;
    }
    putchar('\n');
  }
}