The computer has displayed, in statement form, all of the input that you
told it during the running of the program.  Each line is preceded by a
number.  Input the number of the line you wish to change.  The computer
will re-ask you the appropriate question and then re-display the new list of
input.  When you have modified the input to the way you wish it, press <R>
to rerun the data.

If, due to the new data, the computer needs additional data, it will ask for
it.  Rules will not be displayed as they are used, however you can ask WHY
when the computer asks you for input and you will be able to ask what rules
were used to derive the value for a specific choice.

The computer will display the new sorted list of choices with their values
based on the new data.  You can continue changing the data and re-running
the program as many times as you wish.

Once you have made changes, you may wish to return to your original input
to do this, press the O (the letter O, not zero) and the data will return
to the way it was originally input.

This feature is especially useful in checking the effect that varying one
answer, which you may not be sure about, has on the final sorted list.
Some changes may have large effects while others may have little or no
effect.
