C13112133313331323321333133313331333133313331323133313112113121223321   >>    C1311213331333132332133313331333133313331333132313331311211312122332   <<    C13112133313331323321333133313331333133313331323133313112113121223323   >>      C13112133313331323321333133313331333133313331323133313112113121223322   >>