DTD1.dtd

a b+c+d+n+h+f+v+x+m+o+e+g+i+
b k+l+i+e+(wt)+b?
c k+l+f+h+n+
d l?o+
k o+p+
l dv+
i l+e
e k+l+i?
w e+th+
t k+w? 
o pq+   
p o?m+
q ux
u q?
m qzx+
z m?n+
x rv+
r x?
v yn+
y v?
f gl
g f?
h jn+
j h?
n s
s n?