#include<bits/stdc++.h>
using namespace std;
string s1,s2;

int main()
{
    int i,j,k,ans,len1,len2;
    while(cin>>s1>>s2)
    {
        len1=s1.length();
        len2=s2.length();
        int dp[len1+5][len2+5];
        memset(dp,0,sizeof(dp));

        for(i=0;i<=len1;i++)
        {
            for(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]);
            }
        }
     /*   for(i=0;i<=len1;i++)
        {
            for(j=0;j<=len2;j++)
                cout<<dp[i][j]<<" ";
            cout<<endl;
        }
        */
        cout<<dp[len1][len2]<<endl;

    }
    return 0;
}