In the lesson is says the Japanese word for “excuse me” is suimasen, which is incorrect. The Japanese word for “excuse me” is actually: sumimasen
For questions about Japanese (no script), there is an official forum: [Course Forum] Japanese (no script) 1-7 by Memrise
KanaTsumoto is the Japanese Language Specialist at Memrise.
Regarding your question, MarikoMiz (former Japanese Language Specialist at Memrise) has already explained:
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