#include <fstream>
#include <vector>
#define VAL 2000005

using namespace std;

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

int N, M, i, j;
int FF[VAL];
int KMP[VAL], poz;
string P, S;
vector<int> ANS;
vector<int> :: iterator it;

int main()
{
    fin >> P >> S;
    N=P.size();
    M=S.size();
    P+='*';
    for (i=1; i<N; i++)
    {
        poz=FF[i-1]-1;
        while (poz>0)
        {
            if (P[i]==P[poz+1])
              break;
            else
              poz=FF[poz-1]-1;
        }
        if (P[i]==P[poz+1])
          FF[i]=poz+2;
    }
    for (i=1; i<M; i++)
    {
        poz=KMP[i-1]-1;
        while (poz>0)
        {
            if (S[i]==P[poz+1])
              break;
            else
              poz=KMP[poz-1]-1;
        }
        if (S[i]==P[poz+1])
          KMP[i]=poz+2;
        if (KMP[i]==N)
          ANS.push_back(i-N+1);
    }
    fout << ANS.size() << '\n';
    for (it=ANS.begin(); it!=ANS.end(); it++)
      fout << *it << " ";
    fin.close();
    fout.close();
    return 0;
}