\version "2.18.2"

\parallelMusic #'(voicea voiceb) \transpose c c' {
  \stemUp fis2 a2 f4 fis a2 	|
  \stemDown c2 fis2  f4 c f2	|
}

<<
  
  \new NoteNames {
    \set printOctaveNames = ##f
    \voicea
  }
  \context Staff << 
    \accidentalStyle modern-voice-cautionary
    \new Voice \voicea
    \new Voice \voiceb
  >>
  \new NoteNames {
    \set printOctaveNames = ##f
    \voiceb

  }
>>