* Refal is "Recursive functions algorithmic language"
* and is a pattern matching programming language.
* This entry uses both recursion and pattern matching
* capabilities of refal.

$ENTRY Go { = <Sing 99>;};

Sing {
    s.N = <Prout <Verse s.N>>;
};

Beer {
    0 = "No more bottles of beer";
    1 =