("4.1.4" (collects #"scheme" #"gui.ss") (collects #"htdp" #"draw.ss") (collects #"lang" #"posn.ss") (collects #"mzlib" #"class.ss") (collects #"mzlib" #"unit.ss") (collects #"profj" #"libs" #"java" #"lang" #"String.ss") (collects #"profj" #"libs" #"java" #"lang" #"Throwable.ss") (collects #"profj" #"libs" #"java" #"lang" #"RuntimeException.ss") (ext collects #"scheme" #"gui" #"lang" #"reader.ss"))
