// import java.text.DecimalFormat;

// import java.text.NumberFormat;

import java.util.Scanner;

import java.util.Stack;

public class Backspace {

public static void main(String[] args) {

// long start = System.currentTimeMillis();

Scanner sc = new Scanner(System.in);

char[] arr = sc.nextLine().toCharArray();

Stack<Character> stack = new Stack<>();

int bracketCount = 0;

// read from the right

for (int i = arr.length - 1; i >= 0; i--) {

if (arr[i] == '<')

bracketCount++;

else if (arr[i] != '<' && bracketCount > 0)

bracketCount--;

else

stack.push(arr[i]);

}

StringBuilder strB = new StringBuilder();

while (!stack.isEmpty()) {

strB.append(stack.pop());

}

System.out.println(strB.toString());

// long end = System.currentTimeMillis();

// NumberFormat formatter = new DecimalFormat("#0.00000");

// System.out.print("Execution time is " + formatter.format((end - start) / 1000d) + " seconds");

}

}