#include <fstream>
#include <cstring>

using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");

#define LMAX 2000001
char s1[LMAX], s2[LMAX];
int n1, n2, pi[LMAX];
int v[1000], nr;

void calcPi() {
	pi[0] = -1;
	int k = -1;

	for (int i = 1; i < n1; ++i) {
		while (k > -1 && s1[k + 1] != s1[i])
			k = pi[k];
		if (s1[k + 1] == s1[i])
			++k;
		pi[i] = k;
	}
}

void findOcc() {
	int k = -1;
	int N1 = n1 - 1;

	for (int i = 0; i < n2; ++i) {
		while (k > -1 && s1[k + 1] != s2[i])
			k = pi[k];
		if (s1[k + 1] == s2[i])
			++k;
		if (k == N1) {
			if (nr < 1000)
				v[nr] = i - n1 + 1;
			++nr;
		}
	}
}

int main() {
	f.getline(s1, LMAX);
	f.getline(s2, LMAX);

	n1 = strlen(s1);
	n2 = strlen(s2);

	calcPi();
	findOcc();

	g << nr << '\n';
	if (nr > 1000)
		nr = 1000;
	for (int i = 0; i < nr; ++i)
		g << v[i] << ' ';
	g << '\n';

	return 0;
}