My aunt just text me that my grandpa just died I don't know what to respond to her 🥹?

My grandpa dad side just passed away. I don’t have communication with them but only one aunt. She is married to my dads brother , we always keep in touch even tho we don’t see each other. Me and my dad don’t have communication because of personal issues. What should I respond to my Aunt? 🥹

My aunt just text me that my grandpa just died I don't know what to respond to her 🥹?
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