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1234567 1234 2345 3456 4567 5671 6712 7123 12345 23456 34567 45671 56712 67123 71234 123456 234567 345671 456712 567123 671234 712345 1234567 22 subsets.
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1234567 1234 2345 3456 4567 5671 6712 7123 12345 23456 34567 45671 56712 67123 71234 123456 234567 345671 456712 567123 671234 712345 1234567 22 subsets.