Updated production rules:
rule_68: A40 -> 1 16 1 17
rule_97: A54 -> A40 26 A55 27 31
rule_106: A60 -> A61 25 19
rule_86: A49 -> A50 13 18
rule_25: A16 -> A18 A17 14 10
rule_9: A5 -> 5 8 3 1 4 2
rule_50: A29 -> 28 A9 A31 A30