#include <fstream>
#include<string>
using namespace std;

#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()
{
	int i, q = 0, n = 0;

	ifstream fin("strmatch.in");
	ofstream fout("strmatch.out");
	
	fin.getline(A,100);
	fin.getline(B,100);
	M=strlen(A); N=strlen(B);
	for (int i = M; i; --i) A[i] = A[i-1]; A[0] = ' ';
	for (int 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;	
		}	
	}		

	fout<<n<<'\n';
	for (i = 1; i <= minim(n, 1000); ++i)
		fout<<pos[i]<<' ';
	fout<<'\n';
			
	return 0;
}