def b1(string, i): # (

    if i+1 <= len(string):
        if string[i+1] == ')':
            pass
        elif string[i+1] == '{':
            b2(string,(i+1))
        elif string[i+1] == '[':
            b3(string,(i+1))
        else:

            string = "error"
    return (string)

def b2(string, i): # {
    if i+1 <= len(string):
        if string[i+1] == '}':
            pass

        elif string[i+1] == '(':
            b1(string,(i+1))
        elif string[i+1] == '[':
            b3(string,(i+1))
        else:
            string = "error"
    return (string)


def b3(string, i): # [
    if i+1 <= len(string):
        if string[i+1] == ']':
            pass
        elif string[i+1] == '(':
            b1(string,(i+1))
        elif string[i+1] == '{':
            b2(string,(i+1))
        else:
            string = "error"
    return (string)

def validBraces(string):
    for i in range(len(string)):
        if string[i]=='(':
            lel = b1(string, i)
        elif string[i] == '{':
            lel = b2(string, i)
        elif string[i] == '[':
            lel = b3(string, i)
    if lel == "error":
        return False
    else:
        return True