C1111121111331311211331333133313331313331323223313331323233123121   >>    C111112111133131121133133313331333131333132322331333132323312312   <<    C1111121111331311211331333133313331313331323223313331323233123123   >>      C1111121111331311211331333133313331313331323223313331323233123122   >>