1NT -

1NT =    14-16 (on 3^rd an 4^th seat 15-17) can hold any singleton.

2♣    =    puppet to 2♦    ➲

2♦    =    transfer, 4♥, (5+♥ if weak)    ➲

2♥    =    transfer, 4♠, (5+♠ if weak)    ➲

2♠    =    weak with ♣ or balanced invitational+ or 1M3oM54, GF    ➲

2NT =    5♠, invitational

3♣   =    M55, invitational +    ➲

3♦    =    6+♥ , invitatonal +    ➲

3♥    =    6+♠ , invitatonal, +    ➲

3♠    =    m55, GF, natural follow up