0sp2o8
zsp2o
ysp2
xsp2o8
wsp2o
b2o2o
a2o2
91o2o8
81o2o
71o2
mbo2
lbo2o8
kbo2o
jbo2
ibo2o8
xkn2o8
wkn2o
vkn2
ukn2o8
tkn2o
8tm2o
7tm2
6tm2o8
5tm2o
4tm2