import string
string_of_symbols = input()
list_of_symbols = []
copy_of_list = []
i = 0
k = 0
for symbol in string_of_symbols:
    i += 1
    k += 1
    if string_of_symbols[0] != "[" and string_of_symbols[0] != "(" and string_of_symbols[0] != "{" or len(string_of_symbols) == 1:
        print("1")
        break
    elif symbol == "[" or symbol == "(" or symbol == "{":
        list_of_symbols.append(symbol)
        copy_of_list.append(symbol)
    else:
        if len(list_of_symbols) !=0:
            if (symbol == "]" and list_of_symbols[-1] != "[") or (symbol == "}" and list_of_symbols[-1] != "{") or (symbol == ")" and list_of_symbols[-1] != "("):
                print(i)
                break
            else:
                list_of_symbols.pop()
                k -= 1
                if i == len(string_of_symbols) and len(list_of_symbols) > 0:
                    print(k)
        else:
            if len(string_of_symbols) == 0:
                print("Success")
            print(i)
            break