include("import")

func ClassStr()
  need_string()
  
  fvar(a, b)
  a = 'letters' & 'lowercase' & 'uppercase' & 'digits' & 'hexdigits' & 'octdigits' & 'punctuation' & 'printable' & 'whitespace'
  b = 'string.' && a[Class]
  return(b)
end