C13112133313331323321333133313331333133313331323133313112233121111133313111   >>    C1311213331333132332133313331333133313331333132313331311223312111113331311   <<    C13112133313331323321333133313331333133313331323133313112233121111133313113   >>      C13112133313331323321333133313331333133313331323133313112233121111133313112   >>