I first match the prefix 1 1 21 22 2 1 20 19 by using A34’s fourth alternative and inserting the missing “2”:

- rule_65: A34 → A37 2 A35 20 19

This yields 1,1,21,22,2,1,20,19.

Then A29→1 gives the 9th token 1.

All of the middle block 16 1 15 1 18 17 6 1 12 1 11 14 13 1 (positions 10–23) I emit directly from A24’s first rule by inserting those 14 terminals before its original 1:

- rule_41: A24 → 16 1 15 1 18 17 6 1 12 1 11 14 13 1

Next the 24th–27th tokens 1 10 9 1 come from A18’s first rule with “10 9 1” inserted:

- rule_29: A18 → 1 10 9 1

Finally, the last seven tokens 1 7 8 5 1 4 3 (positions 28–34) come from A2’s second rule by inserting “7 8 5” before A6 and “4” before the final 3:

- rule_4: A2 → A7 7 8 5 A6 4 3

Updated production rules:
rule_4: A2 -> A7 7 8 5 A6 4 3
rule_29: A18 -> 1 10 9 1
rule_41: A24 -> 16 1 15 1 18 17 6 1 12 1 11 14 13 1
rule_65: A34 -> A37 2 A35 20 19