\version "2.23.3"

\paper {
  #(set-paper-size "a4")
}

global = {
  \key f \major
  \numericTimeSignature
  \time 4/4
  \tempo "Andante"
}

soprano = \relative c'' {
  \global
\repeat volta 2
        {  \time 4/4
           g f8 f e4 f
           \alternative { { d8. e16 f8 g a g a c | }
                          { d,4 f8 e d2| }
                        }
       }
}

SopraChorus = \lyricmode {
\repeat volta 2
      { dai dai -- a dai -- a
       \alternative { {  dai -- a dai dai dai -- a dai dai | }
                      {  Chris -- mas has come. | }
                    }
      }
}

\book { \score {  \new ChoirStaff
                       <<  \new Staff \with { instrumentName = "Sopraan"
                                              shortInstrumentName = "S."
                                            }
                                      \new Voice = "soprano" \soprano
                                      \new Lyrics \with { \override VerticalAxisGroup #'staff-affinity = #CENTER
                                                        } \lyricsto "soprano" \SopraChorus

                       >>
                  \layout { }
               }
      }