#include <cstdio>
#include <cstring>
#include <iostream>

using namespace std;
char v[501],w[502];
int a[501][501],d[501][501],f[30];
int main()
{
    FILE *fin=fopen ("subsir.in","r");
    FILE *fout=fopen ("subsir.out","w");
    int n,m,i,j;
    fscanf (fin,"%s\n%s",v+1,w+1);
    n=0;
    for (i=1;v[i]!=0;i++)
        n++;
    m=0;
    for (i=1;w[i]!=0;i++)
        m++;
    for (i=1;i<=n;i++)
        f[v[i]-'a']=1;
    for (i=1;i<=n;i++){
        for (j=1;j<=m;j++){
            //if (i==2 && j==2)
              //  printf ("%d",a[i][j]);
            if (v[i]==w[j]){
                d[i][j]=1+d[i-1][j-1];
                if (d[i][j]>1)
                    a[i][j]=a[i-1][j-1];
                else a[i][j]=1;
            }
            else {
                d[i][j]=max(d[i-1][j],d[i][j-1]);
                if (d[i-1][j]>d[i][j-1])
                    a[i][j]=a[i-1][j];
                else if (d[i-1][j]<d[i][j-1])
                    a[i][j]=a[i][j-1];
                else a[i][j]=a[i][j-1]+a[i-1][j];
            }
        }
    }
    fprintf (fout,"%d",a[n][m]);
    return 0;
}