#include <fstream>
#include <vector>
#include <string>
using namespace std;

void mk_pi(const string& str, vector<int>& pi){
    const int n = str.size();
    pi.resize(n, 0);
    for(int i = 1, v = 0; i < n; ++i){
        for( ; str[v] != str[i] && v; v = pi[v-1]);
        if(str[v] == str[i]){
            ++v;
        }
        pi[i] = v;
    }
}

void do_strmatch(const string& caut, const string& str, int& nr, vector<int>& rez){
    string s = caut;
    s.push_back('#');
    s.append(begin(str), end(str));
    vector<int> pi;

    mk_pi(s, pi);

    for(int i = 0, j = caut.size()+1; j < pi.size(); ++i, ++j){
        if(pi[j] == caut.size()){
            ++nr;
            if(rez.size() < 1000){
                rez.push_back(i-caut.size()+1);
            }
        }
    }
}

int main(){
    ifstream f("strmatch.in");
    ofstream g("strmatch.out");

    string caut, str;
    f >> caut >> str;

    int nr=0;
    vector<int> rez;

    do_strmatch(caut, str, nr, rez);

    g << nr << '\n';
    for(int i = 0; i < rez.size(); ++i){
        g << rez[i] << ' ';
    }
    return 0;
}