**TI82** 1994 Mikael Bonnier,mikaelb@df.lth.se uTOCCATAus>~ ????X+c +c +c&?X?Y+c +c +c'?0U?0V?1N?N?U qV pXT?2UVpYV?TU?U pV l4?X?N+100?N??X?X+Y???'