C13112133313331323321333133313331333133313331323133313112211211222121   >>    C1311213331333132332133313331333133313331333132313331311221121122212   <<    C13112133313331323321333133313331333133313331323133313112211211222123   >>      C13112133313331323321333133313331333133313331323133313112211211222122   >>