program christmas_eve_eve_eve
  implicit none
  integer :: d
  read(*,*) d
  if (d .eq. 25) then
     write(*,'(a)') 'Christmas'
  else if (d .eq. 24) then
     write(*,'(a)') 'Christmas Eve'
  else if (d .eq. 23) then
     write(*,'(a)') 'Christmas Eve Eve'
  else
     write(*,'(a)') 'Christmas Eve Eve Eve'
  end if
  stop
end program christmas_eve_eve_eve