C312322331333132212111133133313331333133312121111331211111333211231211   >>    C31232233133313221211113313331333133313331212111133121111133321123121   <<    C312322331333132212111133133313331333133312121111331211111333211231213   >>      C312322331333132212111133133313331333133312121111331211111333211231212   >>