Updated production rules:
rule_4: A4 -> 1 8 7 6 5 4 3 2
rule_5: A5 -> 30 37 36 35 34 33 32 31
rule_6: A6 -> 38 45 44 43 42 41 40 39
rule_8: A8 -> 46 15 14 13 12 11 10 9
rule_10: A10 -> 47 29 28 27 26 25 24 23
rule_12: A12 -> 48 22 21 20 19 18 17 16