C222133313331333131123313231333133313331313113313233313233232221   >>    C22213331333133313112331323133313331333131311331323331323323222   <<    C222133313331333131123313231333133313331313113313233313233232223   >>      C222133313331333131123313231333133313331313113313233313233232222   >>