Paragraph- Sent 1: Susan wanted to have a birthday party.
Sent  2: She called all of her friends.
Sent  3: She has five friends.
Sent  4: Her mom said that Susan can invite them all to the party.
Sent  5: Her first friend could not go to the party because she was sick.
Sent  6: Her second friend was going out of town.
Sent  7: Her third friend was not so sure if her parents would let her.
Sent  8: The fourth friend said maybe.
Sent  9: The fifth friend could go to the party for sure.
Sent  10: Susan was a little sad.
Sent  11: On the day of the party, all five friends showed up.
Sent  12: Each friend had a present for Susan.
Sent  13: Susan was happy and sent each friend a thank you card the next week.? 
Question: How many thank-you cards did Susan send?
No.