#include <iostream>
#include <fstream>
#include <string>
#include <vector>
using namespace std;
#define DIM 2000005

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

int n, m, nrsol;
vector<int> pi(DIM);
vector<int> sol;
string P, T;

void Read();
void Prefix();
void KMP();
void Write();

int main()
{
    Read();
    Prefix();
    KMP();
    Write(); fout << '\n';

    fin.close();
    fout.close();
    return 0;
}

void Write()
{
    fout << nrsol << '\n';
    for (int i = 0; i < nrsol; ++i)
        fout << sol[i] << ' ';
}

void KMP()
{
    int q = 0;
    for (int i = 1; i <= n; ++i)
    {
        while ( q && P[q+1] != T[i] )
            q = pi[q];
        if ( P[q+1] == T[i] ) q++;

        if ( q == m )
        {
            q = pi[q];
            if ( nrsol == 1000 ) return;
            else
            {
                nrsol++;
                sol.push_back(i-m);
            }
        }
    }
}

void Prefix()
{
    int k = 0;
    n = T.size()-1;
    m = P.size()-1;

    for (int q = 2; q <= m; ++q)
    {
        while ( k && P[k+1] != P[q] )
            k = pi[k];
        if ( P[k+1] == P[q] )
            k++;
        pi[q] = k;
    }
}

void Read()
{
    string a, b;
    fin >> a >> b;
    T.push_back('0');
    P.push_back('0');
    T += b, P += a;
}