C22212323232133313113313331333132313331323133313331213132323122123121   >>    C2221232323213331311331333133313231333132313331333121313232312212312   <<    C22212323232133313113313331333132313331323133313331213132323122123123   >>      C22212323232133313113313331333132313331323133313331213132323122123122   >>