#include<fstream>
#include<string>
using namespace std;
int main()
{
	int total, dumb, i;
	string s;
	ifstream fin("DATA2.txt");
	ofstream fout("OUT2.txt");
	total=0;
	for(dumb=0;dumb<5;++dumb)
	{
		fin>>s;
		for(i=0;i<s.size();++i)
		{
			if(s[i]=='+')
				total++;
			if(s[i]=='-')
				total--;
			if(total<0)
			{
				fout<<"OH NOES!"<<endl;
				break;
			}
		}
		if(total>=0)
			fout<<total<<endl;
		else
		{
			total=0;
		}
	}
	return 0;
}