Updated production rules:
rule_49: A38 -> 36 27 A13 A40
rule_42: A33 -> 34 18 A4 A34
rule_13: A10 -> 6 19 20 18
rule_6: A5 -> 10 2 9 1
rule_35: A28 -> 8 2 31 1
rule_22: A19 -> 30 1 A16 A20 29 27