#include <fstream>
#include <cstring>
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
#define minim(a, b) ((a < b) ? a : b)
#define NMax 2000005

int M, N;
char A[NMax], B[NMax];
int pi[NMax], 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, n = 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];
			++n;
			if (n <= 1000)
				pos[n] = i-M;
		}
	}

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

	return 0;
}