Question 693953
The E's must be side by side. So you can think of EE as one letter (call it Z)


So 


F, R, E, E


turns into


F, R, Z


There are 3 unique letters, so there are 3! = 3*2*1 = 6 permutations and they are



FRZ
FZR
RFZ
RZF
ZFR
ZRF


Wherever you see a "Z" in the list above, just replace it with EE, so you'd get this new list if you do that


FREE
FEER
RFEE
REEF
EEFR
EERF