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

using namespace std;

const int NMAX = 2e6 + 5;
const long long MOD = 1000000123;
const long long BASE = 62;

ifstream cin("strmatch.in");
ofstream cout("strmatch.out");

long long h2[NMAX];

long long key[150];

void FormKey()
{
    int cnt = 0;
    for(char c = '0'; c <= '9'; ++c) {
        key[c] = ++cnt;
    }
    for(char c = 'a'; c <= 'z'; ++c) {
        key[c] = ++cnt;
    }
    for(char c = 'A'; c <= 'Z'; ++c) {
        key[c] = ++cnt;
    }

}
int main()
{
    FormKey();
    string a, b;
    cin >> a >> b;
    long long h1 = 0, h2 = 0;
    long long p = 1, pk = 1;
    for(auto x: a) {
//        h1 = (h1 + key[x] * p) % MOD;
        h1 = (h1 * BASE + key[x]) % MOD;
        pk = p;
        p = (p * BASE) % MOD;
    }
    p = 1;
    int cnt = 0;
    vector <int> sol;
    for(int i = 0; i < a.size(); ++i) {
        h2 = (h2 * BASE + key[b[i]]) % MOD;
    }
    if(h1 == h2) { /// VA PUP ^'^
        cnt++;
        sol.emplace_back(0);
    }
    for(int i = a.size(); i < b.size(); ++i) {
        h2 = h2 - key[b[i - a.size()]] * pk % MOD;
        if(h2 < 0)
            h2 += MOD;
        h2 = (h2 * BASE % MOD + key[b[i]]) % MOD;
        if(h1 == h2) {
            cnt++;
            if(cnt <= 1e3) {
                sol.emplace_back(i - a.size() + 1);
            }
        }
    }
    cout << cnt << "\n";
    for(auto x: sol)
        cout << x << " ";
    cout << "\n";
    return 0;
}