Updated production rules:
rule_4: A3 -> 5 2 4 1
rule_14: A12 -> 3 21 22 20
rule_21: A19 -> 14 21 27 20
rule_23: A20 -> A14 A22 1
rule_40: A31 -> 16 21 30 20
rule_45: A34 -> 8 32 33 31
rule_61: A45 -> 10 2 36 1