v1u2
w1u2r
x1u2rx
y1u2
z1u2r
ksv2r
lsv2rx
msv2
nsv2r
osv2rx
9iw2rx
ajw2
bjw2r
cjw2rx
djw2
y9w2
z9w2r
09w2rx
19w2
29w2r
n0x2r
o0x2rx
p0x2
q0x2r
r0x2rx