\paper{indent=0\mm line-width=110\mm oddFooterMarkup="" oddHeaderMarkup=""}
% --- start of displayed header in the book ---

% --- end of header ---
\new PianoStaff
<<
  \new Staff {
    \relative c''' {\key bes \major \time 2/4
       g8[( f) es( d)]  c[( d) ] <g,-- bes>4
       <g a c>8[ <g a c> <g a c> <g a c>]
       <f-- a d>4 <f-- a d>                    }}
  \new Staff {
    \relative c'' {\time 2/4 \key bes \major \clef bass
       g8[( f) es( d)] c[( d)] <g, bes-->4
       g8[( f) f( e)]  d4-- d--                }}
>>
% --- end of song ---