#include <fstream>
#include <string.h>
using namespace std;
    char N[2000002],M[2000002];
    int urm[2000002],ap[2000001],i,q,n,m,k,j;
int main()
{
    ifstream fin("strmatch.in");
    ofstream fout("strmatch.out");
    fin >> N >> M;
    n=strlen(N);
    for (i=2;i<=n;i++)
    {
    while(k>0 && N[k]!=N[i-1])k=urm[k];
    if (N[k]==N[i-1])k++;
    urm[i]=k;
    }

    m=strlen(M);
    for (i=0;i<m;i++)
    {
    while (q && N[q]!=M[i])q=urm[q];
    if (N[q]==M[i])q++;
    if (q==n)ap[++j]=i-n+1;
    }
    fout << j << '\n';
    j=min(1000,j);
    for (i=1;i<=j;i++)fout << ap[i] << " ";
    fout << '\n';
    return 0;
}