Writing sheet music with abc 

Is it possible to write sheet music with just abc? This is indeed possible with the programme called LilyPond (it's completely free). You will have a better understanding of how it works from its website here. Even a non-musician like me is able to make use of it for my own amusement. After all the principal notes are represented by the letters "c d e f g a b". This is the result of my feeble attempt at using the LilyPond programme.
Believe it or not, all I did was to type the following to obtain the 3 rows of musical notes below:
a' c f, f g a c bes a g bes d
g, g a bes d c gis a c bes a gis a bes c d
c bes f bes c d d dis e g, a bes d c e, f
It's really too good to be true!