               The program you have just run is repeated, but with bugs inserted.
          Your mission, should you choose to accept it, is to kill the bugs and make
          the program identical to the original program.

          WARNING   Whilst working on the program, be careful not to use RUN or you
          =======   will lose the corrections you have made. If you do it
          accidentally, when the menu comes up, press [STOP], then GOTO 1000 to run
          the first program, or GOTO 2000 for the second.
               Once you have discarded a program, it reverts back to square one,
          because you will not have altered the program on disc, only the program in
          memory.
               If a bug proves hard to find, you can bring up the offending line
          directly below the good line as follows: enter AUTO (linenumber-1000),
          1000, then press [RETURN] twice. For example, if the bad line is 2230, then
          enter;-
                                  AUTO 1230,1000
          The two lines displayed will be 1230 and 2230. If it still isn't clear
          press [ENTER] a third time for help.

          The bad program starts at line 2000. If you want to list it type
          LIST 2000-3000; to run it use GOTO 2000.

          Should you wish to save a partially corrected program, remove your course
          disc, replace it with another disc with plenty of space left, and save the
          program in memory under a name such as "bugwork1". To restart, load
          "bugwork1" and carry on. If you wish, you can replace the course disc and
          carry on where you left off, otherwise complete your work on "bugwork",
          then restart "Tutor" on your course disc to continue with EXTRA.
t off, otherwise complete your work on "bugwork",
          then restart "Tutor" on your course disc to continue with EXTR