must fulfill three conditions!

1. In this question, say that a string is well-balanced if the following three conditions are satisfied Every left parenthesis character '(' has a corresponding right parenthesis character ')' some- where to its right, and every left square bracket character '[' has a corresponding right square bracket character')' somewhere to its right. Each"(, ,)', ,(', and .], belongs to exactly one pair of corresponding characters. E.g., ([)] is not well-balance