#include <fstream>
#include <vector>
#include <string>

using namespace std;

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

vector<int> rasp;
string a, b;

int main()
{
    fin.sync_with_stdio(false);
    fout.sync_with_stdio(false);

    fin >> a >> b;

    if (a.size() <= b.size())
    {
        int n = b.size() - a.size();
        int aux = a.size() - 1;

        for (int i = 0; i <= n; i++)
            if (a.back() == b[i + aux])
                if (a == b.substr(i, a.size()))
                    rasp.push_back(i);

        fout << rasp.size() << '\n';
        for (int i = 0; i < rasp.size() && i < 1000; i++)
            fout << rasp[i] << ' ';
    }
    else fout << 0;

    return 0;
}