#include<iostream>
#include<string>

using namespace std;

int main()
{
	string 	start,
			end;
	int 	num,
			maxlength,
			minlength,
			i,
			j,
			maxsize(0);

	cin>>start;
	cin>>end;
	minlength = start.length();
	maxlength = end.length();
	
	for(i = 0;i < minlength;i ++)
	{
		
		for(j = 0;j < maxlength;j ++)
		{
			num = 0;
			while(start[i] == end[j] && j < maxlength&&i < minlength)
			{
				i ++;
				j ++;
				num ++;
			}
			if(maxsize < num)
			{
				maxsize = num;
			}
		}
	}
	cout<<maxsize<<endl;
	return 0;
}