\version "2.19.16"

one = \relative c'' {
  c2 \startTrillSpan
  c2 \stopTrillSpan
}

two = \relative c' {
  c2 
  \acciaccatura { b16 c d }
  c2 
}

\score {
  <<
    \new Staff \one
    \new Staff \two
    \new Staff \partcombine \one \two
  >>
}