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

vector<int> Sol;

int pi[2000005];

void compute_pi(string A,int n)
{
    pi[1] = 0;
    int k = 0;
    for(int i = 1; i < n; i++)
    {
        while(k > 0 && A[k] != A[i])
            k = pi[k+1];
        if(A[i] == A[k])
            k++;
        pi[i+1] = k;
    }
}

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

    string A,B;
    fin >> A >> B;
    int n = A.size();
    int m = B.size();

    if(n > m)
    {
        fout << "0";
        return 0;
    }

    compute_pi(A,n);

    int Nr = 0;
    int k = 0;
    for(int i = 0; i < m; i++)
    {
        while(k > 0 && A[k] != B[i])
            k = pi[k];
        if(A[k] == B[i])
            k++;
        if(k == n)
        {
            Sol.push_back(i-n+1);
        }
    }

    fout << Sol.size() << "\n";
    int lim = Sol.size();
    if(lim > 1000) lim = 1000;
    for(int i = 0; i < lim; i++)
        fout << Sol[i] << " ";

}