#include <fstream>
#include <cstring>
#include <string>
#define P 73
#define MOD1 100007
#define MOD2 100021
using namespace std;

ifstream cin ("strmatch.in");
ofstream cout ("strmatch.out");

char A[2000001];
char B[2000001];
int NA, NB;
int hashA1, hashA2, P1, P2;
char match[2000001];

int main()
{
    cin.get(A, 2000000, '\n');
    cin.get(B, 2000000, 'EOF');
    strcpy(B, B + 1);
    NA = strlen(A);
	NB = strlen(B);

	P1 = P2 = 1;
	hashA1 = hashA2 = 0;
	for (int i = 0; i < NA; i++)
	{
		hashA1 = (hashA1 * P + A[i]) % MOD1;
		hashA2 = (hashA2 * P + A[i]) % MOD2;

		if (i != 0)
			P1 = (P1 * P) % MOD1,
			P2 = (P2 * P) % MOD2;
	}

	if (NA > NB)
	{
		cout << "0" << endl;
		return 0;
	}

	int hash1 = 0, hash2 = 0;
	for (int i = 0; i < NA; i++)
		hash1 = (hash1 * P + B[i]) % MOD1,
		hash2 = (hash2 * P + B[i]) % MOD2;

	int Nr = 0;
	if (hash1 == hashA1 && hash2 == hashA2)
		match[0] = 1, Nr++;

	for (int i = NA; i < NB; i++)
	{
		hash1 = ((hash1 - (B[i - NA] * P1) % MOD1 + MOD1) * P + B[i]) % MOD1;
		hash2 = ((hash2 - (B[i - NA] * P2) % MOD2 + MOD2) * P + B[i]) % MOD2;

		if (hash1 == hashA1 && hash2 == hashA2)
			match[ i - NA + 1 ] = 1, Nr++;
	}
	cout << Nr << endl;

	Nr = 0;
	for (int i = 0; i < NB && Nr < 1000; i++)
		if (match[i])
        {
            Nr++;
			cout << i << " ";
        }

	cout << endl;
    return 0;
}