#include <bits/stdc++.h>

using namespace std;

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

string A, B;
int sol[1 << 22], cnt, p;

int main () {
  fin >> A >> B;
  while (p = B.find (A, p) + 1)
    sol[cnt ++] = p - 1;
  fout << cnt << '\n';
  for (int i = 0; i < cnt && i < 1000; i ++)
    fout << sol[i] << ' ';
  return 0;
}