C13112133313331323321333133313331333133313331323133313112211331221   >>    C1311213331333132332133313331333133313331333132313331311221133122   <<    C13112133313331323321333133313331333133313331323133313112211331223   >>      C13112133313331323321333133313331333133313331323133313112211331222   >>