It was dark and cold in the land of Nemeria. A fellowship of heroes traversed a bridge in a straight line, one after another. Below them, only an abyss. They could hear the howling of strange creatures never seen by humans eyes. But they finally got to the other side of the bridge in safety. Their journey went on.
Below there were six Creatures from the Deep watching the heroes. One of them was their chief. He said:
The Abyss Creature Chief: "There could be humans, elves, dwarves, orcs and even halflings among this group of insolent folks. Were you able to tell which one was which?"
Creature from the Deep 1: "Yes, Chief! First there was a yummy halfling, then a filfhy orc, then a dwarf, a human, another dwarf, a detestable elf, another human and two dwarves." The Abyss Creature Chief: "You got six right guesses, but only one of them in the right position."
Creature from the Deep 2: "I saw a dwarf leading the party, followed by an elf, a human and his halfling slave, two young dwarves, another human and his halfling slave, and finally an orc prisoner." The Abyss Creature Chief: "You also got six right guesses, but two of them in the right position."
Creature from the Deep 3: "No, the leader was an ugly orc, then a halfling, an elf, another halfling, a dwarf, two female humans, another ugly orc and lastly a male human." The Abyss Creature Chief: "Better! You also got six right guesses, but half of them in the right position."
Creature from the Deep 4: "You are all blind! There were two orc leaders, then a halfling, another orc, and two dwarves followed by three pitiful humans." The Abyss Creature Chief: "You are no better than the others. Six right guesses, but again, only half of them in the right position."
Creature from the Deep 5: "I saw what I saw: the leader was a dwarf, followed by a strong orc, then two shiny elves, three tiny halflings, another elf and an orc in the last position." The Abyss Creature Chief: "Finally we have a winner. You got only four guesses right, but all of them were correct."
Then the Creatures from the Deep asked their master: "Chief, what did you see? What was the group consisted of?"
There is only one possibility that agrees with what the Chief saw. Please ignore any description or gender of the heroes, tell us just the sequence of species among humans, elves, dwarves, orcs and halflings.