import java.io.PrintStream;
import java.util.Scanner;
import java.util.Stack;


public class BalancedPrecedence
{
	private static final String OPEN = "([{";
	private static final String CLOSE = ")]}";
	private static Stack<Character> precedenceOps;

	public static void main(String[] args)
	{
		PrintStream output = System.out;
		output.println("Enter expression:");
		Scanner input = new Scanner(System.in);
		String expression = input.nextLine();
		input.close();
		
		// Your code goes here.
		;
		
	}
}