1
A (3)
Although, after, as
2
W (6)
When, whenever, where, whereas, whether, while
3
H (1)
Hence
4
I (2)
If, in order
5
T (3)
Though, That, Than
6
E (2)
Even, Even if
7
B (2)
Before, because
8
U (2)
Until, Unless
9
S (2)
Since, so that
10
OTHERS (3)
Once, Rather, Provided