a = '[노브랜드] 미네랄 워터 생수 (2L x 6개입)'
while True:
    b = a.find('[')
    c = a.find(']')
    if b == -1:
        break
    elif b == 0:
        a = a[c + 1:-1]
    else:
        break
while True:
    d = a.find('(')
    e = a.find(')')
    if d == -1:
        break
    elif d == 0:
        a = a[e + 1:-1]
    else:
        break

result = ''
b = list(a)
for i in b:
    if (ord(i) < 48) or (ord(i) > 57):
        if i == ' ':
            continue
        result += i
    else:
        break
while True:
    if (result[-1] == '(') or (result[-1] == '[') or (result[-1] == ' '):
        result = result[0:-1]
    else:
        break