Problem: You are given strings s and t. Find one longest string that is a subsequence of both s and t.

Constraints

* s and t are strings consisting of lowercase English letters.
* 1 \leq |s|, |t| \leq 3000

Input

Input is given from Standard Input in the following format:


s
t


Output

Print one longest string that is a subsequence of both s and t. If there are multiple such strings, any of them will be accepted.

Examples

Input

axyb
abyxb


Output

axb


Input

aa
xayaz


Output

aa


Input

a
z


Output




Input

abracadabra
avadakedavra


Output

aaadara

Solution (in CPP):

Solution:
#include<bits/stdc++.h>
using namespace std;
int main()
{
	string s,t;
	cin>>s>>t;
	int dp[s.length()+1][t.length()+1];
	memset(dp,0,sizeof(dp));
	int i,j;
	for(i=1;i<=s.length();i++)
	{
		for(j=1;j<=t.length();j++)
		{
			if(s[i-1]==t[j-1])
				dp[i][j]=dp[i-1][j-1]+1;
			else
			    dp[i][j]=max(dp[i-1][j],dp[i][j-1]);
		}
	}
	i=s.length();
	j=t.length();
	string lcs="";
	while(i>0 && j>0) {
		if(dp[i][j]==dp[i-1][j]) 
		i-=1;
		else if(dp[i][j]==dp[i][j-1]) 
		j-=1;
		else {
		lcs=s[i-1]+lcs;
		i-=1;
		j-=1;
	    }
	}
	cout<<lcs;
}