Updated production rules:
rule_3: A2 -> 24 A10 A9
rule_10: A9 -> 18 2 17 1
rule_18: A17 -> 1 A4 A18
rule_20: A18 -> 6 23 31 22
rule_32: A26 -> 9 21 33 20
rule_39: A32 -> 3 36 37 35
rule_45: A37 -> 14 2 39 1
rule_48: A39 -> 12 2 40 1