#include <fstream>

using namespace std;

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

using namespace std;

int ans, phi[405], sol[4000005];
string s1, s2, s;

int main()  {
  fin >> s1 >> s2;
  s = s1 + "$" + s2;
  phi[0] = -1;
  for (int i = 1; i < s.size(); ++i)  {
    int x = i - 1;
    while (s[phi[x] + 1] != s[i] && phi[x] > -1)  {
      x = phi[x];
    }
    if (s[phi[x] + 1] == s[i])
      phi[i] = phi[x] + 1;
    else phi[i] = -1;
    if (phi[i] == s1.size() - 1 && i > s1.size())  {
      ++ans;
      if (ans <= 1000)
        sol[ans] = i - s1.size() - 1 - phi[i];
    }
  }
  fout << ans << '\n';
  for (int i = 1; i <= min(ans, 1000); ++i)
    fout << sol[i] << ' ';
  return 0;
}