C11112331312111112111133133313331333132112312111111221123232321   >>    C1111233131211111211113313331333133313211231211111122112323232   <<    C11112331312111112111133133313331333132112312111111221123232323   >>      C11112331312111112111133133313331333132112312111111221123232322   >>