#include <iostream>
#include <fstream>
#include <string>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
string sablon, text;
int l[2000002], v[1001], n, m;
void make_prefix()
{
    int i,k;
    for(i=2; i<=m; ++i)
    {
        k=l[i-1];
        while (k && sablon[k+1]!=sablon[i])
            k=l[k];
        if(sablon[k+1]==sablon[i]) k++;
        l[i]=k;
    }
}
int main()
{
    fin>>sablon>>text;
    sablon=' '+sablon;
    text=' '+text;
    m=sablon.length()-1;
    n=text.length()-1;
    make_prefix();
    int k=0, i, nr(0);
    for(i=1; i<=n; i++)
    {
        while(k && sablon[k+1]!=text[i]) k=l[k];
        if(sablon[k+1]==text[i])++k;
        if(k==m)
        {
            ++nr;
            if(nr<=1000)v[nr]=i-m;
            k=l[k];
        }
    }
    fout<<nr<<'\n';
    for(i=1; i<=min(1000,nr); ++i)
        fout<<v[i]<<' ';
    return 0;
}