(a,1,2,3,4.2,9.8)
(a,3,0,5,3.5,2.1)
(b,7,9,9,-,-)
(a,7,9,9,2.6,6.2)
(a,1,2,5,7.7,5.9)
(a,1,2,3,1.4,0.2)

