responses to 2C forcing opening bid
2D: No aces, maximum 7 HCP.
2NT: No aces, 8+ HCP.
2H, 2S, 3C, 3D: Ace only in the suit bid. No additional strength promised.
3H, 3S, 4C, 4D: Very strong suit (AKQxxx).
3NT: 2 aces.
4NT: 3 aces.
If opponents interfere:
Pass with a minimum hand and no aces.
Double with good values in the overcalled suit and no aces
In all other cases, bid as without interference.
Opener's rebid and auction's development are naturals.