#include<cstdio>
#include<cstring>

using namespace std;

#define base 101
#define Prim1 100007
#define Prim2 104729

#define MAXS 2000001

char A[MAXS], B[MAXS];
int Na, Nb;

int hash1, hash2, P1, P2;

int main() {
	freopen("strmatch.in", "r", stdin);
	freopen("strmatch.out", "w", stdout);

	scanf("%s %s", A, B);
	Na = strlen(A);
	Nb = strlen(B);

	if (Na > Nb) {
		printf("0\n");
		return 0;
	}

	P1 = P2 = 1;
	hash1 = hash2 = 0;

	for (int i = 0; i < Na; i++) {
		hash1 = (hash1 * base + A[i]) % Prim1;
		hash2 = (hash2 * base + A[i]) % Prim2;

		if (i) {
			P1 = (P1 * base) % Prim1;
			P2 = (P2 * base) % Prim2;
		}
	}

	int hits[MAXS];
	int N, auxH1, auxH2;
	N = 0; 
	auxH1 = auxH2 = 0;
	for (int i = 0; i < Na; i++) {
		auxH1 = (auxH1 * base + B[i]) % Prim1;
		auxH2 = (auxH2 * base + B[i]) % Prim2;
	}

	if (hash1 == auxH1 && hash2 == auxH2) hits[N++] = 1;

	for (int i = Na; i < Nb; i++) {
		auxH1 = ((auxH1 - (B[i-Na] * P1) % Prim1 + Prim1) * base + B[i]) % Prim1;
		auxH2 = ((auxH2 - (B[i-Na] * P2) % Prim2 + Prim2) * base + B[i]) % Prim2;

		if (hash1 == auxH1 && hash2 == auxH2) hits[N++] = i+1;
	}

	printf("%d\n", N);
	for (int i = 0; i < N; i++)
		printf("%d ", hits[i] - Na);
	printf("\n");

	return 0;

}