input question: microwave

output answer: can warm oil

input question: To add a promo code to your Uber order

output answer: Open the Uber app. Tap the menu button. Tap Payment. Tap Add Promo/Gift Code. Type in your PROMO CODE. Tap ADD.

input question: To send a letter in the mail,

output answer:
write the destination address on the front, center of the envelope. Place the required amount of postage onto the envelope in the top right corner. Write the return address in the top left corner.