#include <fstream>
#include <string>
#include <vector>

using namespace std;

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

string A, B;
int T[2000001];
vector<int> sol;

int main()
{
    fin>>A>>B;
    for(int i=1;i<A.length();i++)
    {
        if(A[ T[i-1] ] == A[i])
            T[i] = 1 + T[i-1];
        else if(A[i]==A[0])
            T[i] = 1;
    }

    int k = 0;
    for(int i=0;i<B.length();i++)
    {
        do
        {
            k++,i++;
        }while(A[k] == B[i] && k<A.length() && i<B.length());
        k--,i--;

        if(k==A.length()-1)
            sol.push_back(i);
        k = T[k];
    }
    fout<<sol.size()<<'\n';
    for(size_t i = 0; i<sol.size();i++)
        fout<<sol[i]-A.length()+1<<' ';
    fin.close();
    fout.close();
    return 0;
}