import java.util.*;
import java.io.*;
import java_cup.runtime.*;

class SDriver {
	public static void main(String[] args) throws IOException {
		//Yylex scanner = new Yylex(System.in);
		Yylex scanner = new Yylex(new FileInputStream(new File("calc.txt")));
		
		Symbol t;
		do {t = scanner.next_token();}
		while (t != null);
	}
}