#include <fstream>
#include <string>
using namespace std;

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

string a, b;

int p[4000001];

int main()
{
    int i, j, n, nr = 0;
    fin >> a >> b;
    n = a.size();
    a += '#';
    a += b;

    for (i = 1; i<a.size(); i++)
    {
        j = p[i-1];
        while (j > 0 && a[i] != a[j])
            j = p[j-1];
        if (a[i] == a[j])
            j++;
        p[i] = j;

        if (p[i] == n)
            nr++;
    }

    fout << nr << '\n';
    nr = min(nr, 1000);
    for (i = n+1; i<a.size() && nr > 0; i++)
        if (p[i] == n)
        {
            fout << i - 2*n << ' ';
            nr--;
        }
    return 0;
}