Updated production rules:
rule_8: A3 -> 8 1 3 A4
rule_55: A28 -> 28 27 A34 A29 26 22
rule_60: A31 -> 1 34
rule_68: A35 -> A16 1 17 18
rule_38: A20 -> 12 1 10 11 A22 A21 20 19
rule_93: A48 -> A6 A39 30 36 35 25