#include <fstream>
#include <string>

using namespace std;

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

int nr, V[2000010], Sol[1010];
string A, B;

void Prefix()
{
    int k = 0;
    for (int i = 1; i < A.size(); i ++)
    {
        while (k && A[i] != A[k]) k = V[k - 1];
        if (A[i] == A[k]) k ++;
        V[i] = k;
    }
}

void KMP()
{
    Prefix();
    int k = 0;
    for (int i = 0; i < B.size(); i ++)
    {
        while (k && B[i] != A[k]) k = V[k - 1];
        if (B[i] == A[k]) k ++;
        if (k == A.size())
        {
            k = V[k - 1];
            if (Sol[0] < 1000) Sol[++Sol[0]] = i - A.size() + 1;
        }
    }
}

int main()
{
    fin >> A >> B;

    KMP();

    fout << Sol[0] << '\n';
    for (int i = 1; i <= Sol[0]; i ++) fout << Sol[i] << ' ';
    fout << '\n';
    fout.close();
    return 0;
}