12, 14, 16, 18, 21

For quite a while now, William has counted like this:
"1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 16, 18, 21, 22..." and then he sort of peters out.
He never deviates.  He counts incorrectly the same way every time.

This morning, he and Abby were playing together and she was counting:
"1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 16, 18, 21, 22..."
 His pattern verbatim.

Guess we know who taught her to count :)
Happy Monday.