1♥ - 2♠ - 2NT - 3♣ -

3♦   =    some singleton or void   ➤    3♥ = asking    ➲ 

3♥        =    13-, 5422    ➤    3♠ = asking for 2^nd suit, natural answers

3♠    =    13-, 6322    ➤    3NT = asking for 2nd suit, natural answers

3NT    =    13-, 7222    

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