%{
  prints natural sign and merged g note on 2nd quarter,
  sharp and merged gis on 3rd quarter
%}
\version "2.19.58"
\new Voice \relative c'' {
  <<
    { \voiceOne c4 g4 g4 ais4 }
    \new Voice { \voiceTwo gis4 gis4 gis4 gis4 }
  >> \oneVoice
}