list
mist
fist
hiss
diss
A four letter word with RA in the middle: bran.
Some 4 letter words with 'au' in the middle:FauxHaulMaulTautSee the related link for a full list.
Four letter words with o e in the middle are: coeddoerdoesfoesgoergoeshoedhoerhoesJoeljoesjoeykoelnoelnoespoempoetroestoeatoedtoesvoeswoeszoea
Bath
Cork
afar
Amid
errs
feudll
the answer is puts
Sele
Afar is a four letter word with f and a as the 2 middle letters in that order.