lesson_2.3-5

void main() {
// Вывести на экран количество уникальных слов в тексте.

  const text = '''
She sells sea shells on the sea shore
The shells that she sells are sea shells I'm sure
So if she sells sea shells on the sea shore
I'm sure that the shells are sea shore shells
''';
  
  final textSet = text.split(' ').toSet();
  print('Число уникальных слов ${textSet.length}');

}