### begin_: tryStuff_Caller.pl
    use strict;
    use warnings;
    use tryStuffAlpha;  ### <a href="./tryStuffAlpha.pm" />
    use tryStuffBeta;   ### <a href="./tryStuffBeta.pm" />

### begin_: main
    print "1: ". tryStuffAlpha::SayHello();    ### OK
    print "2: ". tryStuffBeta::SayHello();     ### OK

    print "3: ". tryStuffAlpha::SayOpposite(); ### OK
    print "4: ". tryStuffBeta::SayOpposite();  ### OK

    print "5: ". $tryStuffAlpha::PermaLink;    ### OK
    print "6: ". $tryStuffBeta::PermaLink;     ### OK

    print "7: ". $tryStuffAlpha::OppositePermaLink;    ### FAILS
    print "8: ". $tryStuffBeta::OppositePermaLink;     ### FAILS