---

// ZADANIE 2 Lopatin Timofey iD - 324
String maskPhone(String phone) {
  String result = '';

  for (int i = 0; i < phone.length - 5; i++) {
    result += '*';
  }

  result += phone.substring(phone.length - 5);

  return result;
}

void main() {
  String phone = '+7 123 456-78-90';

  print(maskPhone(phone));
}