import java.util.*;

public class SymbolTable extends Vector{
  
  public SymbolTable(){
    super(0,1);
  }
  
  public void addSymbol(String symbol){
    super.addElement(symbol);
  }

  public int getIndex(String symbol){
    return(super.indexOf(symbol));
  }
  
  public String getSymbol(int index){
    return((String)super.elementAt(index));
  }

}