C11112331312111112111133133313331333132313233313232112323223321   >>    C1111233131211111211113313331333133313231323331323211232322332   <<    C11112331312111112111133133313331333132313233313232112323223323   >>      C11112331312111112111133133313331333132313233313232112323223322   >>