#!/usr/bin/perl

# http://perlmonks.org/?node_id=1192327

use strict;
use warnings;

print /^Fruit(?:\{|s\{(?: \w+)+) \w+ \}$/ ? 'Pass  ' : 'Fail  ', $_
  while <DATA>;

__DATA__
Fruits{ Apple Mango Grape Watermelon }
Fruit{ Apple }
Fruits{ Lemon Mandarin }{ Orange Fig Pineapple }
Vegetable{ Carrot }
who
knows{ what }
you expect here