title: how to find cryptarithmetic letter value?
body: <p>Cross + roads = danger ==> the answer is ==> 96233 + 62513=158746</p>
  
  <p>I'm looking for a instruction to find the answer easier for another example. one of my teacher said  that we can using tree to find it.  but sometimes using tree to find the answer is impossible.  </p>
  
  <p>How do you usually find you're cryptarithmetic solution?</p>