acetic 0 1
c 0 3
c2h2 0 1
ch3f 0 1
cl 0 2
cn 0 2
f 0 2
f2o 0 1
h 0 2
hnc 0 1
hocl 0 1
n 0 4
o 0 3
s 0 3
s2 0 3
s2o 0 1
