def isBalanced(s):
    stack = []
    open_brackets = ['(', '[', '{']
    close_brackets = [')', ']', '}']
    
    result = 'YES'
    
    if len(s) > 1:
        for char in s:
            if char in open_brackets:
                stack.append(char)
            elif char in close_brackets:
                if (
                    (char == ')' and stack and stack[-1] == '(') or
                    (char == ']' and stack and stack[-1] == '[') or
                    (char == '}' and stack and stack[-1] == '{')
                ):
                    stack.pop()
                else:
                    result = 'NO'
                    break

    else:
        result = 'NO'

    if stack or result == 'NO':
        return 'NO'

    return 'YES'