1	1001	\N	FOO
1	1002	\N	FOO
1	1003	\N	FOO
1	1004	\N	FOO
1	1005	\N	review
1	1006	10	FOO
1	1007	10	FOO
1	1008	\N	FOO
1	1009	11	FOO
1	2001	12	FOO
1	2002	\N	review
1	2003	\N	FOO
1	2004	13	FOO
1	2005	\N	FOO
2	1001	\N	FOO
2	1002	\N	FOO
2	1003	\N	FOO
2	1004	\N	FOO
2	1005	\N	review
2	1006	20	FOO
2	1007	20	FOO
2	1008	\N	FOO
2	1009	21	FOO
2	2001	22	FOO
2	2002	\N	review
2	2003	\N	FOO
2	2004	23	FOO
2	2005	\N	FOO