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#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] << ' ';
}
}