10. Input line
    ~~~~~~~~~~
An ordinary INPUT statement will strip any leading spaces off strings, and
will not accept commas within a string. The latter is because you can use 
commas to separate your replies, instead of pressing <Return> each time, eg
BLOGGS,45,MALE <Return>. You are reminded that the alternative command
INPUTLINE will accept commas and leading spaces. You can easily strip the
leading spaces off afterwards, if they are a problem.