sm2r
rm2rev
qm2re
pm2r
om2rev
3v1rev
2v1re
1v1r
0v1rev
zv1re
e50re
d50r
c50rev
b50re
a50r
pe0r
oe0rev
ne0re
me0r
le0rev
0nzrev
znzre
ynzr
xnzrev
wnzre