C22212323232133313113313331333132313331323231323323233313121311   >>    C2221232323213331311331333133313231333132323132332323331312131   <<    C22212323232133313113313331333132313331323231323323233313121313   >>      C22212323232133313113313331333132313331323231323323233313121312   >>