Solve the riddle:
He has one and a person has two.
A citizen has three.
And a human being has four.
A personality has five.
And an inhabitant of earth has six.
What is it?

Below you will find a hint and the correct answer to the riddle.
Little hint:
Show Hint
Hint: S*ll*bl*.
Right answer:
Show answer
Answer: Syllable.