Updated production rules:
rule_2: A2 -> 1 4 3
rule_39: A20 -> A26 A21 13 12 11 1 9 10 6
rule_48: A26 -> 20 A27 19 8
rule_55: A29 -> 21 1 22 A33
rule_65: A36 -> A9 A23 14 15
rule_71: A38 -> 1 28 A42 26
rule_81: A45 -> A9 1 16 17