#include <fstream>
#include <vector>
#include <string>
using namespace std;

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

vector<int> make_prefix(string pattern)
{
    int len = 0;
    vector<int> pi(pattern.size(), 0);
    pi[0] = 0;
    int i = 1;
    while (i < pattern.length())
    {
        if (pattern[i] == pattern[len])
        {
            len++;
            pi[i] = len;
            i++;
        }
        else
        {
            if (len == 0)
            {
                pi[i] = 0;
                i++;
            }
            else
            {
                len = pi[len - 1];
            }
        }
    }

    return pi;
}

vector<int> match(string &text, string &pattern)
{
    int n = text.length();
    int m = pattern.length();
    vector<int> result;

    int i = 0, j = 0;
    vector<int> pi = make_prefix(pattern);
    while (i < n)
    {
        if (pattern[j] == text[i])
        {
            i++;
            j++;
        }
        if (j == m)
        {
            result.push_back(i - m);
            if (result.size() == 1000)
                return result;
            j = pi[j - 1];
        }
        else if (i < n && text[i] != pattern[j])
        {
            if (j == 0)
                i++;
            else
                j = pi[j - 1];
        }
    }
    return result;
}

int main()
{
    string s, pattern;
    getline(in, pattern);
    getline(in, s);

    vector<int> r = match(s, pattern);
    out << r.size() << endl;
    for (int pos : r)

        out << pos << " ";

    return 0;
}