:import std/Combinator .
:import std/Number .
:import std/String .
main [y [[=?0 case-end case-rec]] (+99)]
case-rec n ++ t1 ++ n ++ t2 ++ t3 ++ n ++ t1 ++ "\n" ++ (1 --0)
n number→string 0
t1 " bottles of beer on the wall\n"
t2 " bottles of beer\n"
t3 "Take one down, pass it around\n"
case-end empty