C22212323232133313113313331333132313331323231323323233311331211   >>    C2221232323213331311331333133313231333132323132332323331133121   <<    C22212323232133313113313331333132313331323231323323233311331213   >>      C22212323232133313113313331333132313331323231323323233311331212   >>