C31232233133313221211113313331333132313331322121111112211232313231313121   >>    C3123223313331322121111331333133313231333132212111111221123231323131312   <<    C31232233133313221211113313331333132313331322121111112211232313231313123   >>      C31232233133313221211113313331333132313331322121111112211232313231313122   >>