#include <fstream>
#include <vector>

using namespace std;

ifstream fin("strmatch.in");
ofstream fout("strmatch.out");

const int NMAX = 2000000;

int aux[NMAX];
vector <int> a;
int main()
{
    string s,pat;
    fin>>pat>>s;
    //acum trebuie sa cream vectorul auxiliar special de poz
    aux[0] = 0;
    int i = 0,j = 1;
    while(j < pat.size())
    {
        if(pat[i] == pat[j])
        {
            aux[j] = i + 1;
            i++;
            j++;
        }
        else if(i == 0)
        {
            j++;
            aux[j] = 0;
        }
        else
        {
            i = aux[i - 1];
        }
    }
    i = 0,j = 0;
    int ans = 0;
    while(i < s.size())
    {
        if(pat[j] == s[i])
        {
            j++;
            i++;
        }
        if(j == pat.size())
        {
            ans++;
            a.push_back(i - j);
        }
        if(s[i] != pat[j])
        {
            if(j != 0)
            j = aux[j - 1];
            else
            i++;
        }
    }
    fout<<ans<<"\n";
    int lim = min(a.size(),1000)
    for(int i = 0;i <lim;i++)
        fout<<a[i]<<" ";
    return 0;
}