# include <fstream>
# include <algorithm>
# include <vector>
# include <queue>
# include <cstring>
# define NR 2000005
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
int i,j,n,m,la,lb,VV,k;
int sol[1005], pi[NR];
char a[NR], b[NR];
int main ()
{
    f.getline (a+1, NR); la=strlen (a+1);
    f.getline (b+1, NR); lb=strlen (b+1);

    //prefix
    for (i=2; i<=la; ++i)
    {
        while (k>0 && a[k+1]!=a[i])
            k=pi[k];
        if (a[k+1]==a[i]) ++k;
        pi[i]=k;
    }

    k=0;
    for (i=1; i<=lb; ++i)
    {
        while (k>0 && a[k+1]!=b[i])
            k=pi[k];
        if (a[k+1]==b[i]) ++k;
        if (k==la)
        {
            ++VV;
            if (VV<=1000) sol[VV]=i-la;
            k=pi[k];
        }
    }

    g<<VV<<"\n";
    for (i=1; i<=min(VV, 1000); ++i)
        g<<sol[i]<<" ";
    return 0;
}