def parentheses(s):
    for i in range(len(s)):
        if s[i] in list(pairs.values()):
            parens.append(s[i])
        else:
            if i > 0:
                prev = parens[-1]
            else:
                return i + 1
            if pairs[s[i]] == prev:
                parens.pop()
            else:
                return i + 1

    if len(parens) != 0:
        return len(s)
    else:
        return 'Success'

parens = []
pairs = {')': '(', ']': '[', '}': '{'}

s = input()
parentheses(s)