#include <iostream>
#include <vector>

using namespace std;

int kmp[4002002];

int main ()
{
    freopen("strmatch.in", "r", stdin);
    freopen("strmatch.out", "w", stdout);
    string key, t; cin >> key >> t;
    t = " " + key + '$' + t;
    key = " " + key;
    int k = 0;
    int ans = 0;
    vector<int> ap;
    for (int i = 2; i < t.size(); i++)
    {
        while (k > 0 && t[k+1] != t[i])
        {
            k = kmp[k];
        }
        if (t[k+1] == t[i]) k++;
        kmp[i] = k;
        if (k == key.size() - 1)
        {
            ans++;
            if (ans <= 1000)
            {
                ap.push_back(i - 2 * key.size() + 1);
            }
        }
    }
    cout << ans << '\n';
    for (auto a : ap)
    {
        cout << a << ' ';
    }

}