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

#define MXLEN 2000000

string N, M;
int n, m;
vector<int> * pi;

void calculate_prefix()
{
    pi->at(0) = -1;
    int k = -1;
    for(int i=1; i<n; ++i)
    {
        while(k >= 0 && N[k+1] != N[i])
            k = pi->at(k);
        if(N[k+1] == N[i])
            ++k;
        pi->at(i) = k;
    }
}

void find_matches(ofstream &out)
{
    vector<int> matches(1000);
    int k = -1;
    int nr = 0;
    for(int i=0; i<m && nr<1000; ++i)
    {
        while(k >=0 && N[k+1] != M[i])
            k = pi->at(k); 
        if(N[k+1] == M[i])
            ++k;
        if(k == n-1)
        {
            matches[nr++] = i - n + 1;
            k = pi->at(k);

        }
    }
    out << nr << endl;
    for(int i=0; i < nr; ++i)
        out << matches[i] << " ";
    out << endl;
}

int main()
{
    ifstream in("strmatch.in");
    getline(in, N);
    getline(in, M);
    n = N.length(); m = M.length();
    in.close();
    ofstream out("strmatch.out");
    pi = new vector<int>(n);
    calculate_prefix();
    find_matches(out);
    delete pi;
    out.close();
    return 0;
}