a t y
a c 3.6
a c 5.3
a m 8.9
a m 8.8
a n 8.8
a n 6.8
a q 8.7
a q 9
b c 3.8
b c 4.8
b m 2.5
b m 3.9
b n 4.1
b n 3.4
b q 3.6
b q 3.8