1.1	1.2	1.3	1.4	1.5	1.6	1.7	1.8	1.9	1.10
c1	c1.1	c1.2	c2.1	c2.2	c5.1	c5.2	c6.1	c6.2	c8.1
c8.2	c9.1	c9.2	c10.1	c10.2	c11.1	c11.2	c12.1	c12.2	c14.1
c14.2	c15.1	c15.2	c16.1	c16.2	c17.1	c17.2	c19.1	c19.2