C13112133313331323321333133313331333131211113313331323231323221   >>    C1311213331333132332133313331333133313121111331333132323132322   <<    C13112133313331323321333133313331333131211113313331323231323223   >>      C13112133313331323321333133313331333131211113313331323231323222   >>