Recursion-Isbalanced ? Plz help what's the question is asking?

Take as input str, a string. The string is a mathematical expression e.g. “[a + {b + (c + d) + e} + f]”. Write a recursive function which tests if the brackets in expression are balanced or not and returns a Boolean value. Print the value returned.

Input Format

Enter the string



Output Format

Display the boolean result

Sample Input


Sample Output