Each of the words below is missing two copies of two different letters, in some order. Fill in the missing letters. As an additional hint, the words are all in alphabetical order.

1.		17.
2.		18.
3.		19.
4.		20.
5.		21.
6.		22.
7.		23.
8.		24.
9.		25.
10.		26.
11.		27.
12.		28.
13.		29.
14.		30.
15.		31.
16.		32.