How about an R?
Sorry, Mark. No R’s
Any A’s?
Only one A.
_ _ A _ _
_ _ _ _ _ _ _ _ _ _
Any E’s?
Or T’s?
Plenty of both! And probably enough to hint at the answer. 
_ _ A _ T
T E _ _ _ _ _ E _ E
Letters used: T, E, A, R
Any S’s?
Any N on the mix?
No S but two Ns
_ _ A N T
T E _ _ N _ _ E _ E
Letters used: T, E, A, R, S, N
GIANT TECHNOPEDE!
We have a winner! Your turn, Liam. 
All right, pick the bones out of this:
I’ll start asking for an O.
One O:
_ _ _ _ _ _ O
Thought there would be more… what about a T?
A couple of T’s - one of them probably where you expect!
T _ _
_ _ _ _ _ T O
Used: O, T
Yes
I assume the second letter is an H, are there more? (If it indeed is an H)
And this is where the plot takes a twist - no H’s!
T _ _
_ _ _ _ _ T O
Used: O, T, H
How about an E?