#include <fstream>
#include <string>
#include <vector>

#define a 73
#define MOD1 100003
#define MOD2 100037
using namespace std;

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

string s1, s2;
vector<int> v;

int main()
{
	fin >> s1;
	fin >> s2;

	if (s1.size() > s2.size())
	{
		fout << 0;
		return 0;
	}

	long long  hashA1 = 0, hashA2 = 0;
	long long pow1 = 1, pow2 = 1;
	for (int i = 0; i < s1.size(); i++)
	{
		hashA1 = (hashA1 * a % MOD1 + s1[i]) % MOD1;
		hashA2 = (hashA2 * a % MOD2 + s1[i]) % MOD2;

		if (i > 0)
		{
			pow1 = pow1 * a % MOD1;
			pow2 = pow2 * a % MOD2;
		}
	}

	long long hashB1 = 0, hashB2 = 0;
	for (int i = 0; i < s1.size(); i++)
	{
		hashB1 = (hashB1 * a + s2[i]) % MOD1;
		hashB2 = (hashB2 * a + s2[i]) % MOD2;
	}

	if (hashA1 == hashB1 && hashA2 == hashB2)
		v.push_back(0);

	for (int i = s1.size(); i < s2.size(); i++)
	{
		hashB1 = ((hashB1 - s2[i - s1.size()] * pow1 % MOD1 + MOD1) * a + s2[i]) % MOD1;
		hashB2 = ((hashB2 - s2[i - s1.size()] * pow2 % MOD2 + MOD2) * a + s2[i]) % MOD2;
		if (hashA1 == hashB1 && hashA2 == hashB2)
			v.push_back(i - s1.size() + 1);
	}

	fout << v.size() << '\n';
	for (int i = 0; i < v.size(); i++)
		fout << v[i] << ' ';
	return 0;
}