C22212323232133313113313331333132313331323133313331213132323212232211   >>    C2221232323213331311331333133313231333132313331333121313232321223221   <<    C22212323232133313113313331333132313331323133313331213132323212232213   >>      C22212323232133313113313331333132313331323133313331213132323212232212   >>