Who Stole My Letter?

Carletta wrote a letter to Santa Claus, so did her classmates. Unfortunately, after the fire drill, Carletta's letter was missing. It could not be found. Carletta, the tallest third-grader in the class, became upset and stated that there were thieves in the class. From that moment on, her letter traveled surreptitiously and intentionally, from one thief to another. Mrs. Carter, Carletta's teacher, does her best, but she is helpless and clueless as to how to recover the letter.