#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
char patern[2000004], text[2000004];
int pi[2000004], pos[2000004], i, n, m, ind, sol;
void genereaza()
{
    int i, q=0;
    for(i=1; i<n; i++)
    {
        while(q&&patern[i]!=patern[q]) q=pi[q-1];
        if(patern[i]==patern[q])
        {
            q++;
        }
        pi[i]=q;
    }
}
int main()
{
    ifstream fin("strmatch.in");
    ofstream fout("strmatch.out");
    fin.getline(patern, 2000002);
    fin.getline(text, 2000002);
    n=strlen(patern);
    m=strlen(text);
    genereaza();
    ind=i;
    for(i=0; i<m; i++)
    {

        while(text[i]!=patern[ind]&&ind) ind=pi[ind-1];
        if(text[i]==patern[ind]) ind++;
        if(ind==n)
        {
            ++sol;
            if(sol<=1000) pos[sol]=i-n;
        }

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