#include <fstream>
#include <vector>
#include <iostream>

// c u l s i u a a v o m n e w d h h x q q p m b o p i h m w d r h n x a g y g j y b c c u l s i uaavomnculsiuaavculsiuaavomculsiuaavomnewdhhx
//-1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1

std::vector<int> first_occurence(const std::string &data, const std::string &key)
{
	std::vector<int> v(key.size() + 1);
	v[0] = -1, v[1] = 0;
	std::vector<int> ret;

	for (unsigned i = 1; i < v.size() - 1; i++)
		if (key[i] == key[v[i]])
			v[i + 1] = v[i] + 1;
		else
			if (v[v[i]] >= 0 && key[v[v[i]]] == key[i])
				v[i + 1] = v[v[i]] + 1;
			else
				v[i + 1] = 0;

	//for (unsigned ii = 0; ii < v.size(); ii++)
    //	std::cout << v[ii] << ' ';
    //std::cout << '\n';

	unsigned it1 = 0, it2 = 0;
	while (it1 < data.size())
	{
		if (data[it1] == key[it2])
		{
			it1++, it2++;
			if (it2 == key.size())
			{
				ret.push_back(it1 - key.size());
				it2 = v[it2];
			}
			continue;
		}
		it2 = v[it2] < 0 ? it1++, 0 : v[it2];
	}

	return ret;
}

std::vector<int> first_occurence2(const std::string &data, const std::string &key)
{
	int i = 0, k = 0, n, m, t = 0;
	std::vector<int> ret, pmt(key.size() + 1, 0);
 
    m = key.size();
    n = data.size();
    pmt[0] = -1;
    k = 2;
    while (k <= m)
    {
        while (key[k - 1] == key[t])
        	pmt[k++] = ++t;
        if (t)
        	t = pmt[t];
        else
        	pmt[k++] = 0;
    }
    //for (unsigned ii = 0; ii < pmt.size(); ii++)
    //	std::cout << pmt[ii] << ' ';
    //std::cout << '\n';
    k = 0;
    while (k + i < n)
    {
        while (key[i] == data[k + i] && i < m)
        	i++;
        if (i == m)
        	ret.push_back(k);
        k += i - pmt[i];
        if (pmt[i] > -1)
        	i = pmt[i];
        else
        	i = 0;
    }
    return ret;
}

int main()
{
	std::ifstream in("strmatch.in");
	std::ofstream out("strmatch.out");
	std::string data, key;
	in >> key >> data;
	auto ret = first_occurence(data, key);
	//ret = first_occurence2(data, key);
	out << ret.size() << '\n';
	int s = std::min(1000, static_cast<int>(ret.size()));
	for (int i = 0; i < s; i++)
		out << ret[i] << ' ';
	out << '\n';
}