#include <fstream>
#include <cstring>
#define MAX 4000000
#define MAXANS 1000
using namespace std;
ifstream cin ("strmatch.in");
ofstream cout ("strmatch.out");
int pi[MAX + 10], ans[MAXANS + 10];
string s1, s2, s;
int main()
{
    cin >> s1 >> s2;
    int k = 0;
    pi[0] = 0;
    for (int i = 1; i < s1.size(); i++)
    {
        while (k != 0 && s1[i] != s1[k])
            k = pi[k - 1];
        if (s1[i] == s1[k])
            k++;
        pi[i] = k;
    }
    k = 0;
    int cnt = 0;
    for (int i = 0; i < s2.size(); i++)
    {
        while (k != 0 && s2[i] != s1[k])
            k = pi[k - 1];
        if (s2[i] == s1[k])
            k++;
        if (k == s1.size())
        {
            cnt++;
            if (cnt <= 1000)
                ans[cnt] = i - s1.size() + 1;
        }
    }
    cout << cnt << '\n';
    for (int i = 1; i <= min(cnt, 1000); i++)
        cout << ans[i] << ' ';
    return 0;
}