C1111233131211111211113313331333133313331333133313331323221121121   >>    C111123313121111121111331333133313331333133313331333132322112112   <<    C1111233131211111211113313331333133313331333133313331323221121123   >>      C1111233131211111211113313331333133313331333133313331323221121122   >>