C312322331333132212111133133313331333133312121111331333113313231121   >>    C31232233133313221211113313331333133313331212111133133311331323112   <<    C312322331333132212111133133313331333133312121111331333113313231123   >>      C312322331333132212111133133313331333133312121111331333113313231122   >>