def is_paired(seq: str) -> bool:
    stack = []

    open_brackets = "([{"
    close_brackets = ")]}"

    for ch in seq:
        if(ch in open_brackets):
            stack.append(ch)
            continue

        matched_closed = close_brackets.find(ch)
        if(matched_closed != -1):
            if(not len(stack) or stack[-1] != open_brackets[matched_closed]):
                return False
            else:
                stack.pop()
    return not len(stack)