Complete the Sequence


1
1 1
2 1
1 2 1 1
1 1 1 2 2 1
3 1 2 2 1 1
1 3 1 1 2 2 2 1
1 1 1 3 2 1 3 2 1 1
? ? ? ? ? ? ? ? ? ? ? ? ? ?


Answer NOT POSTED YET
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