Three students, with different names, line up single file. What is the probability that they are in alphabetical order from front-to-back?  Express your answer as a common fraction.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Three students, with different names, line up single file. What is the probability that they are in alphabetical order from front-to-back?  Express your answer as a common fraction.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac{1}{6}
Three students, with different names, line up single file. What is the probability that they are in alphabetical order from front-to-back?  Express your answer as a common fraction.
train