Sentence:Although a commercial Enigma, modified by Polish cryptanalysts to match a military Enigma, used phone plugs, the [e1]plugs[/e1] in the [e2]plugboard[/e2] of the actual Enigma had two prongs, but they still functioned electrically in the same way as phone plugs.
 e1: plugs. 
 e2 : plugboard.
Answer: Other