#include <fstream>
#include<cstring>
#define minim(a, b) ((a < b) ? a : b)
#define NMax 2000005
using namespace std;
ifstream f("strmatch.in",fstream::in);
ofstream g("strmatch.out",fstream::out);
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.getline(A+1, sizeof(A));
	f.getline(B+1, sizeof(B));
    N=strlen(B+1);
    M=strlen(A+1);
	//for (i = M; i; --i) A[i] = A[i-1]; A[0] = ' ';
	//for (i = N; i; --i) B[i] = B[i-1]; B[0] = ' ';
   A[0]=' ';
   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]<<" ";
	//printf("\n");
    f.close();
    g.close();
	return 0;
}