\version "2.18.2"

\paper {
  tagline = ##f
}

up = \change Staff = "up"
down = \change Staff = "down"

\score {
  \new PianoStaff <<
    \new Staff = "up" {
      \time 2/4
      s2
    }
    \new Staff = "down" {
      \clef bass
      \override Beam.auto-knee-gap = 1
      c32[
      \up
      c''
      <cis'' dis''>
      \down
      c
      \up
      c''
      \down
      c <cis dis>
      \up
      c'']
      r4
    }   
  >>
}