Originally interest in game if the weak hand has better distribution

Stayman, can pass any answer
→ then 3♦ = no 4♥/♠; 3♥ = 4♥; 3♠ = 4♠; 3NT = 4♥ & 4♠

Minor asking, GF
→ then 3♥ = 4+♣; 3♠ = 4+♦; 3NT = no 4+card minor

5+♥, asking for ♥ fit, GF
→ then 4♥ = fit; 3NT = no fit; NS = Q or shortness with fit

5+♠, asking for ♠ fit, GF
→ then 4♠ = fit; 3NT = no fit; NS = Q or shortness with fit

Natural, final contract