Change the words below into new ones by adding the same two letters to each word. The two letters may be added in either order and the letters of the words may or may not have to be re-arranged.

BAT
BAG
TAP
INN
FIN

HINT:
One of the two added letters is L.

Answers:

The two added letters are E and L.:

BLEAT
BAGEL
PLATE
LINEN
ELFIN