#include <cstdio>
#include <cstring>

using namespace std;

char a[2000000], b[2000000];

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

	int n, m;
	int matches[1000];

	fgets(a+1, sizeof(a), stdin);
	fgets(b+1, sizeof(b), stdin);

	n = strlen(a+1);
    if (a[n] == '\n') {
        a[n] = 0;
        --n;
    }

	m = strlen(b+1);
    if (b[m] == '\n') {
        b[m] = 0;
        --m;
    }

	int pi[n+1];
	pi[1] = 1;
	int k=0;

	for(int i=2; i<=n; ++i) {
		while(k > 0 && a[k+1] != a[i])
			k = pi[k];
		if (a[k+1] == a[i])
			++k;
		pi[i] = k;
	}

	int q=0, matchno = 0;
	for(int i=1; i<=m; ++i) {
		while (q>0 && a[q+1] != b[i])
			q = pi[q];
		if (a[q+1] == b[i])
			++q;
		if (q == n) {
			if (matchno < 1000)
				matches[matchno] = i - n;
			++matchno;
			q = pi[n];
		}
	}

	printf("%d\n", matchno);
	for(int i=0; i<matchno && i < 1000; ++i)
		printf("%d ", matches[i]);

	return 0;
}