C22212323232133313113313331333132313331323133313331213132333111323123221   >>    C2221232323213331311331333133313231333132313331333121313233311132312322   <<    C22212323232133313113313331333132313331323133313331213132333111323123223   >>      C22212323232133313113313331333132313331323133313331213132333111323123222   >>