C11112331312111112111133133313331333132112312111133211232323221   >>    C1111233131211111211113313331333133313211231211113321123232322   <<    C11112331312111112111133133313331333132112312111133211232323223   >>      C11112331312111112111133133313331333132112312111133211232323222   >>