"F" In Dusguise

The sound that F makes is not always made by F. Sometimes it's made by imposter- phony F's! Usually the imposter is double agent Phrankie Phrence or double agent Ralgh Ratlough. Both of these agents pose as other sounds in other words.

Each of these words can be finished correctly by one of these imposters. Tell which one by selecting PH or GH to complete each word below.