"What is your idea?" is "staa nuzr suh dee?" That is what they would say instead. However, "What do you have in your brain/mind?" (you need to specify whose mind you are talking about) you would say "suh d staa ackl bandee dee?"
If u mean how do you say "your" in pashto then its "sta"
Shohar
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"uba"
graan
Shaythaan
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Rekhtaya
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Pasia
salam