[sth to sth]
The reason for preferring (1) to (2) is simply that (1) is manifestly invariant. [Note the double r in preferring.]
However, we prefer to avoid this issue altogether by neglecting the contribution of $B$ to $S$.
Go to the list of words starting with: a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
y
z