sample_2.dat 116 B

1234567
  1. 9 ORE => 2 A
  2. 8 ORE => 3 B
  3. 7 ORE => 5 C
  4. 3 A, 4 B => 1 AB
  5. 5 B, 7 C => 1 BC
  6. 4 C, 1 A => 1 CA
  7. 2 AB, 3 BC, 4 CA => 1 FUEL