#include <fstream>
#include <cstring>
#define MAX 4000000
using namespace std;
ifstream cin ("strmatch.in");
ofstream cout ("strmatch.out");
int pi[MAX + 10];
string s1, s2, s;
int main()
{
    cin >> s1 >> s2;
    s = s1 + "#" + s2;
    int k = 0;
    pi[0] = 0;
    for (int i = 1; i < s.size(); i++)
    {
        while (k != 0 && s[k] != s[i])
            k = pi[k - 1];
        if (s[k] == s[i])
            k++;
        pi[i] = k;
    }
    int cnt = 0;
    for (int i = s1.size() + 1; i < s.size(); i++)
        if (pi[i] == s1.size())
            cnt++;
    cout << cnt << '\n';
    cnt = 0;
    for (int i = s1.size() + 1; i < s.size(); i++)
        if (pi[i] == s1.size())
        {
            cnt++;
            if (cnt <= 1000)
                cout << i - 2 * s1.size() << ' ';
        }
    return 0;
}