0	0
2	3
4	6
6	9
8	12
10	15
12	18
14	21
16	24
18	27
\N	0
\N	-1
\N	-2
\N	0
\N	-1
\N	-2
0	0
2	3
4	6
6	9
8	12
10	15
12	18
14	21
16	24
18	27
12	18
14	21
16	24
18	27
0	0
2	3
4	6
6	9
8	12
\N	0
\N	-1
\N	-2
0	0
2	3
4	6
6	9
8	12
10	15
12	18
14	21
16	24
18	27
10	15
\N	0
\N	-1
\N	-2
\N
123
1	1
1	3
2	\N
2	2
2	1
2	7
2	\N
3	\N
3	2
3	4
2	\N
2	\N
3	\N
1	3
2	7
3	4
1	1
2	2
2	1
3	2
1	3
2	7
3	4
1	1
2	2
2	1
3	2