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