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

const int LMAX = 2000005;

char p[LMAX], t[LMAX];
int pl, tl;
int pref[LMAX];

void build_pref() {
	int m = 0, i = 1;

	while (i < pl) {
		if (p[i] == p[m]) {
			m += 1;
			pref[i] = m;
			i += 1;
		} else if (m != 0) {
			m = pref[m - 1];
		} else {
			pref[i] = 0;
			i += 1;
		}
	}
}

void kmp() {
	std::vector<int> matches;

	int i = 0, j = 0;

	while (j < tl) {
		if (p[i] != t[j]) {
			if (i == 0)
				j++;
			else
				i = pref[i - 1];
		} else {
			i++;
			j++;

			if (i == pl) {
				matches.push_back(j - i);
				i = pref[i - 1];
			}
		}
	}

	printf("%ld\n", matches.size());
	for (auto m: matches)
		printf("%d ", m);
}

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

	scanf("%s %s", p, t);

	pl = strlen(p);
	tl = strlen(t);

	build_pref();
	kmp();
}