Permutations For PREFER

Here are all the permutations for the letters PREFER.

pref pref perf perf perf perf pref pref rpef rpef repf refp rfep rfep repf refp eprf eprf erpf erfp efrp efrp erpf erfp frep frep ferp ferp ferp ferp frep frep eprf eprf erpf erfp efrp efrp erpf erfp rpef rpef repf refp rfep rfep repf refp