#include <fstream>
#include <string>
#include <vector>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");

string s1, s2;
unsigned long long h1, h2, p_n = 1;
long long p = 31;
vector<int> prez;

int main()
{
    fin >> s1 >> s2;
    if (s1.size() > s2.size())
        swap(s1, s2);
    for (int i = 0; i < s1.size(); i++) {
        h1 = h1 * p + s1[i];
        h2 = h2 * p + s2[i];
        p_n = p_n * p;
    }
    if (h1 == h2)
        prez.push_back(0);
    for (int i = s1.size(); i < s2.size(); i++) {
        h2 = h2 * p + s2[i] - p_n * s2[i - s1.size()];
        if (h1 == h2)
            prez.push_back(i - s1.size() + 1);
    }
    fout << prez.size() << '\n';
    for (int i = 0; i < min(1000, (int)prez.size()); i++) {
        fout << prez[i] << ' ';
    }
}