#include <fstream>
#include <string>

using namespace std;

ifstream in("DATA2.txt");
ofstream out("OUT2.txt");

int process(string transactions, int balance)
{
     for (int i(0); i < transactions.length(); i++)
     {
         if (transactions[i] == '+')
         {
            balance++;                    
         } else {
           balance--;
           if (balance < 0)
           {
              break;            
           }       
           
         }
     }   
     
    if (balance < 0)
     {
        out<<"OH NOES!\n";
        return 0;            
     } else {
        out<<balance<<endl;
        return balance;       
     }
}

int main()
{
    int balance(0);
    for (int i(0); i < 5; i++)
    {
        string transaction;
        in>>transaction;
        balance = process(transaction, balance);
    }
 
    return 0;   
}