sample_1.dat 94 B

123456
  1. 10 ORE => 10 A
  2. 1 ORE => 1 B
  3. 7 A, 1 B => 1 C
  4. 7 A, 1 C => 1 D
  5. 7 A, 1 D => 1 E
  6. 7 A, 1 E => 1 FUEL