#include <fstream>
#include <cstring>
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
#define minim(a, b) ((a < b) ? a : b)


int m, n;
char a[2000005], b[2000005];
int pi[2000005], pos[1024];

void make_prefix(void)
{
	int i, q = 0;

	for (i = 2, pi[1] = 0; i <= m; ++i)
	{
		while (q && a[q+1] != a[i])
			q = pi[q];
		if (a[q+1] == a[i])
			++q;
		pi[i] = q;
	}
}

int main(void)
{
	int i, q = 0, nr = 0;

f>>a;
f>>b;

m=strlen(a);
n=strlen(b);
	for (i = m; i; --i) a[i] = a[i-1]; a[0] = ' ';
	for (i = n; i; --i) b[i] = b[i-1]; b[0] = ' ';

	make_prefix();

	for (i = 1; i <= n; ++i)
	{
		while (q && a[q+1] != b[i])
			q = pi[q];
		if (a[q+1] == b[i])
			++q;
		if (q == m)
		{
			q = pi[m];
			++nr;
			if (nr <= 1000)
				pos[nr] = i-m;
		}
	}

	g<<nr<<'\n';
	for (i = 1; i <= minim(nr, 1000); ++i)
		g<<pos[i]<<" ";
	g<<'\n';

	return 0;
}