def checkio(expression):
    temp = []
    try:
        for i in expression:
            if i == "(" or i == '{' or i == '[':
                temp.append(i)
            elif i == ")" or i == '}' or i == ']':
                if resk(i) == temp[len(temp)-1]:
                    del temp[len(temp)-1]
                else:
                    raise IndexError()
    except IndexError:
        return False

    if temp == []:
        return True

    return False

def resk(s):
    if s == ')':
        return '('
    elif s == '}':
        return '{'
    elif s == ']':
        return '['