// a rule system
// a char is equivalent to a given string ('A' > "AB" 

class Rule { 
  char input; 
  String output; 
  String [] outputArray; 

  // constructor classes
  Rule (char in, String out) { 
    input = in; 
    output = out; 
  }   

  Rule (char in, String [] out) { 
    input = in; 
    outputArray = out;

  } 

  char getInput () { 
    return input; 
  } 

  String getOutput () { 
    return output; 
  }



}