#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

vector <int> getMatches(string s, string t) {
    int n = s.size();
    int m = t.size();
    vector <int> pi(n);
    int k = -1;
    pi[0] = -1;
    for(int i = 1 ; i < n ; ++ i) {
        while(k != -1 && s[k + 1] != s[i])
            k = pi[k];
        if(s[k + 1] == s[i])
            ++ k;
        pi[i] = k;
    }
    k = -1;
    vector <int> v;
    for(int i = 0 ; i < m ; ++ i) {
        while(k != -1 && s[k + 1] != t[i])
            k = pi[k];
        if(s[k + 1] == t[i])
            ++ k;
        if(k == n - 1) {
            v.push_back(i - k);
        }
    }
    return v;
}

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

    string s, t;
    getline(fin, s);
    getline(fin, t);
    vector <int> matches = getMatches(s, t);
    fout << matches.size() << '\n';
    for(int i = 0 ; i < min(1000, int(matches.size())) ; ++ i)
        fout << matches[i] << ' ';
}