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Puzzle Round 3, answering form 27a

Good evening!
I've been trying to submit the answers 27a, 27b, 28a, 28b but I keep getting the following message: Your (highlighted) answer may contain only digits 0-6!
Am I doing something wrong?

Thank you,
Amalia.

Since Puzzle 27's grids are only 6 wide, it should be impossible to get an answer that has 7-9 as digits.