#include<cstdio>
#include<cstring>
#include<vector>
#include<deque>

using namespace std;
char a[2000001], b[2000001], x[2000001];
long long na, nb, nr;
vector <int> L;

int main() {
	int i, j;
	
	freopen("strmatch.in", "r", stdin), freopen("strmatch.out", "w", stdout);
	scanf("%s %s", a, b);
	
	for(i = 0; a[i]; i++) na = na + (a[i] - '0');
	for(i = 0, j = 0; b[i]; i++) {
		while(nb > na) nb = nb - (b[j++] - '0');		
		if(nb == na && strlen(a) == i - j) {
			strncpy(x, b + j, i - j);
			if(strcmp(x, a) == 0) nr++, L.push_back(j);
		}		
		nb = nb + (b[i] - '0');
	}
	
	printf("%lld\n", nr); 
	nr = nr < 1000 ? nr : 1000;
	for(i = 0; i < nr; i++) printf("%d ", L[i]);
	
	return 0;
}