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# dummy items to play with
my @animals = (qw( cow camel dog cat  ));
...
        completion_list => \@animals,
    }
};

Press TAB for autocompletion or available options

...
autocompletion nested>                                                
+ # ENTER 2 exits the user input cycle
CHOOSEN: select camel take_to desert                                  
+ # finally we print the resulting path

#!perl
use strict;
...
            return @res;
    };
}