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FLINTSTONES -- BARNEY, FRED, WILMA
JETSONS -- MAX, TONY, WILMA
SIMPSONS -- LISA, BARNEY, WILMA, HOMER
ALCATRAZ -- ELIJAH, MAX, WILMA

sub nice_list {
   return ''    if @_ == 0;
...
         nice_list(@$eaters), "\n");
}
}

BARNEY can be found 2: FLINTSTONES SIMPSONS
FRED can be found 1: FLINTSTONES
WILMA can be found 4: FLINTSTONES JETSONS SIMPSONS ALCATRAZ
MAX can be found 2: JETSONS ALCATRAZ 
and so forth...