\version "2.12.3."

\relative c' {
  \time 4/4
  \clef treble
 <<{\voiceOne g'8.--\p [c16 f8 c~c f] a,8.-- [b16~b8 g' b, g'] a,8.-- [b16~b8 \tieDown fis'~fis? b,] g8.--\> [c16 f!8~f c~c\!]} \new Voice  {\voiceTwo \mergeDifferentlyHeadedOn \mergeDifferentlyDottedOn g2. \mergeDifferentlyHeadedOff \mergeDifferentlyDottedOff a4~a2\< a\!~a4  \mergeDifferentlyHeadedOn \mergeDifferentlyDottedOn g2.}>> 
}