program Animals
  class Animal {
    char[] name;
  }
{
  void setName(Animal a, char[] name) {
    a.name = name;
  }
  void aPrint(Animal a)
    int i, l;
    char c;
  {
    l = len(a.name);
    i = 0;
    while (i < l) {
      print(a.name[i]);
      i += 1;
    }
  }
  void main()
    int a;
    Animal[] animals;
    char[] cat;
    char[] dog;
    char[] octopus;
  {
    cat = new char[3];
    cat[0] = 'c';
    cat[1] = 'a';
    cat[2] = 't';
    dog = new char[3];
    dog[0] = 'd';
    dog[1] = 'o';
    dog[2] = 'g';
    octopus = new char[7];
    octopus[0] = 'o';
    octopus[1] = 'c';
    octopus[2] = 't';
    octopus[3] = 'o';
    octopus[4] = 'p';
    octopus[5] = 'u';
    octopus[6] = 's';

    animals = new Animal[3];
    animals[0] = new Animal;
    animals[1] = new Animal;
    animals[2] = new Animal;
    setName(animals[0],cat);
    setName(animals[1],dog);
    setName(animals[2],octopus);
    read(a);
    aPrint(animals[a]);
  }
}