#include<bits/stdc++.h>
using namespace std;


int main()
{
    string s1,s2;
    while(getline(cin,s1))
    {
        getline(cin,s2);
        int len1=s1.length();
        int len2=s2.length();
        int dp[len1+5][len2+5];
        memset(dp,0,sizeof(dp));
        for(int i=0;i<=len1;i++)
        {
            for(int j=0;j<=len2;j++)
            {
                if(i==0 || j==0)
                {
                    dp[i][j]=0;
                }
                else if(s1[i-1]==s2[j-1])
                {
                    dp[i][j]=dp[i-1][j-1]+1;
                }
                else
                {
                    dp[i][j]=max(dp[i-1][j],dp[i][j-1]);
                }
            }
        }
        cout<<dp[len1][len2]<<endl;
    }
    return 0;
}