while (cin >> s1 >> s2)
{
    memset(dp, 0, sizeof(dp));
    int n1 = strlen(s1), n2 = strlen(s2);
    for (int i = 1; i <= n1; ++i)
        for (int j = 1; j <= n2; ++j)
            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[n1][n2] << endl;
}