Declarer (South) has opened 1♠, you (West) have overcalled in hearts, and your partner (East) has raised you in hearts, in a way that shows 3+♥.
North has supported spades and the final contract is 4♠ played by South, with you on opening lead. You play standard signals, hi=enc/lo=discourage, and not udca.
And as additional treat, you only get to see the major suits in your hand and dummy for now (you have no spades):
Scoring: IMP
You lead a high heart at trick one and partner plays the 9.
Is partner encouraging you to lead another high heart? Or is it suit preference, asking for diamonds? Or something else?
OK, OK ... I'll show you dummy's diamonds.
♦AQJ9

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