C111123313121111121111331333133313331333132232233131211113313231121123231   >>    C11112331312111112111133133313331333133313223223313121111331323112112323   <<    C111123313121111121111331333133313331333132232233131211113313231121123233   >>      C111123313121111121111331333133313331333132232233131211113313231121123232   >>