#include<iostream>
#include<string>
#include<fstream>
#include<iomanip>
#include<vector>
#include<cctype>
#include<algorithm>
using namespace std;

int main()
{
	string s, t;
	cin >> s >> t;
	s += t;
	int ans;
	string r = "o";
	for (int i = 1; i <= 14; i++)
	{
		for (int j = 0; j <= 14 - i; j++)
		{
			if (s.substr(j, i) == r)
			{
				ans = i;
				break;
			}
		}
		r += "o";
	}
	cout << ans << endl;
	return 0;
}