a
ab
c
ch
ds
dsh
e
eb
ec
ecb
ed
edb
ee
f
h
i
ib
ii
j
k
kh
l
lh
m
n
ng
nn
o
p
ph
r
s
ss
t
th
ts
tsh
tx
txh
u
w
x
y
yb
yy