procedure words(k)
local wchar, wordlist, line, i, j
wchar := &lcase ++ &ucase ++ '\'-'
wordlist := []
while line := read() do {
i := 1
while j := upto(wchar,line,i) do {
i := many(wchar,line,j)
put(wordlist,line[i:j])
if *wordlist = k then break break
}
}
return wordlist
end