C22212323232133313113313331333132313331323133313331213132333113112211121   >>    C2221232323213331311331333133313231333132313331333121313233311311221112   <<    C22212323232133313113313331333132313331323133313331213132333113112211123   >>      C22212323232133313113313331333132313331323133313331213132333113112211122   >>