C312322331333132212111133133313331333133312121111121133121333121   >>    C31232233133313221211113313331333133313331212111112113312133312   <<    C312322331333132212111133133313331333133312121111121133121333123   >>      C312322331333132212111133133313331333133312121111121133121333122   >>