#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vi = vector<int>;
using pii = pair<int,int>;
#define eb emplace_back

const string TASK("strmatch");

ifstream fin(TASK + ".in");
ofstream fout(TASK + ".out");

string p, s;

vi Z() {
  int n = s.size();
  vi z(n, 0);
  int l = 0, r = 0;
  for (int i = 1; i < n; ++i) {
    if (i <= r) z[i] = min(r - i + 1, z[i - l]);
    while (i + z[i] < n && s[z[i]] == s[i + z[i]]) ++z[i];
    if (i + z[i] - 1 > r)
      r = i + z[i] - 1, l = i;
  }
  return z;
}

int32_t main() {
  fin >> p >> s;
  s = p + "#" + s;
  vi z = Z(), ans;
  int sz = 0;
  for (int i = p.size() + 1; i < s.size(); ++i)
  if (z[i] == p.size()) {
    ++sz;
    if (ans.size() < 1000) ans.eb(i - p.size() - 1);
  }
  fout << sz << '\n';
  for (auto i : ans)
    fout << i << ' ';
}