Sentence 1: I walked to the mailbox to see if I got any mail. 
 Sentence 3: The letter was addressed to a person I didn't know 
 Sentence 4:  I ripped open the letter and read it anyway 
 Sentence 5:  I wrote back to the sender and told him to not bother me 
 Given Sentence 2: There was only bills and a single personal letter.