In PATHFIND.MOD you can replace 'stdio' with 'InOut', but then
 FST Modula-2 will produce a 25k EXE file (!)

 To compile using stdio, type SET M2OUTPUT=OBJ, then compile - but
 do not link.  Exit M2 and type LINK PATHFIND+STDIO+SYSTEM (then
 just press enter for all prompts).  This will produce a 1.6k EXE.