C22212323232133313113313331333132313331323133313331213132323212332211221   >>    C2221232323213331311331333133313231333132313331333121313232321233221122   <<    C22212323232133313113313331333132313331323133313331213132323212332211223   >>      C22212323232133313113313331333132313331323133313331213132323212332211222   >>