#include <stdio.h>
#include <cstring>
#define minim(a, b) ((a < b) ? a : b)
#define NMax 2000005

int M, N;
char A[NMax], B[NMax];
int pi[NMax], pos[1024000];

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;

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

	fgets(A, sizeof(A), stdin);
	fgets(B, sizeof(B), stdin);
		
	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 <= 1000000)
				pos[n] = i-M;	
		}	
	}		

	printf("%d\n", n);
	for (i = 1; i <= minim(n, 1000000); ++i)
		printf("%d ", pos[i]);
	printf("\n");

	return 0;
}