// https://goo.gl/fBmFxu
#include <bits/stdc++.h>
using namespace std;

#define NMAX        2000006
#define MMAX        200009
#define kInf        (1 << 30)
#define kInfLL      (1LL << 60)
#define kMod        666013
#define edge pair<int, int>
#define x first
#define y second

#define USE_FILES "MLC"

#ifdef USE_FILES
#define cin fin
#define cout fout
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
#endif

// number of tests from "in"
int test_cnt = 1;
void clean_test();

// your global variables are here

int n, m;
string subsir, sir;
int ant[NMAX];

void prefix() {
    int k = 0; ant[1] = 0;
    for (int i = 2; i <= n; ++i) {
        while(subsir[k + 1] != subsir[i] && k > 0) k = ant[k];
        if (subsir[k + 1] == subsir[i]) {
            ++k;
        }
        ant[i] = k;
    }
}

// your solution is here
void solve() {
    cin >> subsir;
    cin >> sir;
    n = subsir.size();
    m = sir.size();
    sir = ' ' + sir;
    subsir = ' ' + subsir;
    prefix();
    int k = 0;
    // daca sunt mai mult de 1000 de aparitii nu le mai afisez
    // restrictie infoarena
    vector<int>sol;
    int nr = 0;
    for (int i = 1; i <= m; ++i) {
        while (subsir[k + 1] != sir[i] && k > 0) k = ant[k];
        if (subsir[k + 1] == sir[i]) ++k;
        if (k == n) {
            k = ant[k];
            if (nr < 1000) {
                ++nr;
                sol.push_back(i - n);
            }
        }
    }
    cout << nr << "\n";
    for (int i = 0; i < sol.size(); ++i) {
        cout << sol[i] << " ";
    }
    if (test_cnt > 0) {
        clean_test();
    }
}


void clean_test() {
    // clean if needed
}

int main() {
//     cin >> test_cnt;
    while (test_cnt--) {
        solve();
    }

    return 0;
}