C1111233131211111211113313331333133313331333133313331333133313232213221221   >>    C111123313121111121111331333133313331333133313331333133313331323221322122   <<    C1111233131211111211113313331333133313331333133313331333133313232213221223   >>      C1111233131211111211113313331333133313331333133313331333133313232213221222   >>