#include<bits/stdc++.h>
using namespace std;
#define debug(x) cerr<<#x<<' '<<x<<endl
#ifndef ONLINE_JUDGE
	#define pia getchar
#else
	#define pia nc
#endif
char nc(){
  	static char buf[1<<25],*p=buf,*q=buf;
  	if(p==q&&(q=(p=buf)+fread(buf,1,1<<25,stdin),p==q))return EOF;
  	return *p++;
}
template<class T>void rd(T&x){
	short f=1;x=0;
	char ch=pia();
	while(!isdigit(ch)){
		if(ch=='-')f=-1;
		ch=pia();
	}while(isdigit(ch)){
		x=(x<<1)+(x<<3)+(ch^48);
		ch=pia();
	}x*=f;
}
template<class T>void wr(T x){
	if(x<0)putchar('-'),x=-x;
	if(x>=10)wr(x/10);
	putchar(x%10+48);
}

#define maxn 4005
int n,m;
unsigned short ans;
char a[maxn],b[maxn];
unsigned short f[maxn][maxn];
signed main(){
	scanf("%s%s",a+1,b+1);
	n=strlen(a+1),m=strlen(b+1);
	for(int i=1;i<=n;i++)
	for(int j=1;j<=m;j++)
		if(a[i]==b[j]){
			f[i][j]=f[i-1][j-1]+1;
			ans=max(ans,f[i][j]);
		}
	wr(ans);
}