[plt-scheme] Need Help for Strings!!!!

Hi All!
  I am very beginner in PLT Scheme. I wanted to know
few things:
   1. How can I convert a string into a list?
   2. Or can I work with strings directly same as C?
Does it contain library functions for string
operations?
   
   I need this information as I am trying to generate
a truth table for the given logical expression.
e.g. Given string is: A&B
  Output should be:
  A  B   A&B
  0  0    0
  0  1    0
  1  0    0
  1  1    1
Thanks in advance,
D Patel

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