#include <cstdio>
#include <iostream>
#include <vector>
using namespace std;
string pattern, text;

const int P = 73;
const int MOD1 = 1e9+9;
const int MOD2 = 1e9+21;
const int NMAX = 2000505;

int H_MOD1[NMAX], H_MOD2[NMAX];

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

	cin.tie(NULL);
	ios_base::sync_with_stdio(false);

	cin >> pattern >> text;
	int N = (int) pattern.size(), M = (int) text.size();

	int hashMod1 = 0L, hashMod2 = 0L, powN_MOD1 = 1, powN_MOD2 = 1;
	for (int idx = 0; idx < N; idx++) {
		hashMod1 = (1LL * hashMod1 * P + pattern[idx]) % MOD1;
		hashMod2 = (1LL * hashMod2 * P + pattern[idx]) % MOD2;
		powN_MOD1 = (1LL * powN_MOD1 * P) % MOD1;
		powN_MOD2 = (1LL * powN_MOD2 * P) % MOD2;
	}

	for (int idx = 0; idx < M; idx++) {
		H_MOD1[idx + 1] = (1LL * H_MOD1[idx] * P + text[idx]) % MOD1;
		H_MOD2[idx + 1] = (1LL * H_MOD2[idx] * P + text[idx]) % MOD2;
	}

	int matches = 0;
	vector<int> sol;
	for (int st = 1; st <= M - N; st++) {
		int currH_MOD1 = (H_MOD1[st + N - 1] + MOD1 - (1LL * H_MOD1[st - 1] * powN_MOD1) % MOD1) % MOD1;
		int currH_MOD2 = (H_MOD2[st + N - 1] + MOD2 - (1LL * H_MOD2[st - 1] * powN_MOD2 % MOD2)) % MOD2;
		if (hashMod1 == currH_MOD1 && hashMod2 == currH_MOD2) {
			matches++;
			if (matches <= 1000) {
				sol.push_back(st);
			}
		}
	}

	cout << matches << "\n";
	for (auto match : sol) {
		cout << match - 1 << " ";
	}
	cout << "\n";
	return 0;
}