C11112331312111112111133133313331333132313233313232112323221231   >>    C1111233131211111211113313331333133313231323331323211232322123   <<    C11112331312111112111133133313331333132313233313232112323221233   >>      C11112331312111112111133133313331333132313233313232112323221232   >>