There are 13 3-letter words listed below. For each of them, insert two letters between any one pair of letters in the word or at the end of the word (but not at the beginning), to form a 5-letter word. The two added letters must be adjacent to each other in the 5-letter word.

When complete, all 26 letters of the alphabet will have been used as fill-ins.

ant          dim          see
ass          eel          tie
bay          far          top
coy          mar          win
pie

What if the two letters were allowed at the beginning of the word? Try to find a few like that.