C11112331312111112111133133313331333132313233313331323233231221   >>    C1111233131211111211113313331333133313231323331333132323323122   <<    C11112331312111112111133133313331333132313233313331323233231223   >>      C11112331312111112111133133313331333132313233313331323233231222   >>