import java.util.*;

public class ParenBalancing4 {

    public static void main (String[] argv)
    {
	String s = "if ((x < y) && (Math.abs(x)>0)) { if(x==5) {x += 3;}}";o
	checkParens (s);

	s = "I think (I mean thought (but do I really mean think?)) ...";
	checkParens (s);

	s = "if ((x < y) && (Math.abs(x)>0) { if(x==5) {x += 3;}";
	checkParens (s);

	s = "I think (I mean thought )but do I really mean think?)) ...";
	checkParens (s);
    }

    static void checkParens (String inputStr)
    {
    }

}