C111123313331323113313331333133313331122112312111112111111211233112121   >>    C11112331333132311331333133313331333112211231211111211111121123311212   <<    C111123313331323113313331333133313331122112312111112111111211233112123   >>      C111123313331323113313331333133313331122112312111112111111211233112122   >>