C22212323232133313113313331333132313331323133313331213132323132213132121   >>    C2221232323213331311331333133313231333132313331333121313232313221313212   <<    C22212323232133313113313331333132313331323133313331213132323132213132123   >>      C22212323232133313113313331333132313331323133313331213132323132213132122   >>