Sentence 1: Lanie's teacher had everyone in the class get a pen pal. 
 Sentence 3: Their friendship grew from their childhood into their teen years 
 Sentence 4:  They stopped writing and began using the phone to keep in touch 
 Sentence 5:  When Lanie and her friend were adults, they finally met in person 
 Given Sentence 2: Her job was to search flooded neighborhoods for stranded pets.