#include<fstream>
#include<cstring>
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
int n,m,k,nr,p[2000005],poz[1005];
char A[2000005],B[2000005];
void prefix()
{
    int i,q=0;
    p[1]=0;
    for (i=2;i<=m;++i)
        {
            while (q>0 && A[q+1]!=A[i])
                q=p[q];
            if (A[q+1]==A[i]) ++q;
            p[i]=q;
        }
}
int main()
{
    int i;
    f.getline(A+1,2000004);
    f.getline(B+1,2000004);
    A[0]=B[0]=' ';
    n=strlen(B)-1;
    m=strlen(A)-1;
    prefix();
    for (i=1;i<=n;++i)
        {
            while (k>0 && A[k+1]!=B[i])
                k=p[k];
            if (A[k+1]==B[i]) ++k;
            if (k==m)
                {
                    if (nr<1000)
                        poz[++nr]=i-m;
                    else ++nr;
                    k=p[k];
                }
        }
    g<<nr<<'\n';
    for (i=1;i<=min(nr,1000);++i)
        g<<poz[i]<<' ';
    g<<'\n';
    return 0;
}