//ALEXANDRU MICLEA

#include <vector>
#include <algorithm>
#include <string>
#include <string.h>
#include <cstring>
#include <queue>
#include <map>
#include <set>
#include <unordered_map>
#include <time.h>
#include <iomanip>
#include <deque>
#include <math.h>
#include <cmath>
#include <assert.h>
#include <stack>
#include <bitset>
#include <random>
#include <chrono>
#include <assert.h>

using namespace std;
using ll = long long;

#include <fstream>
//ifstream cin("input.in"); ofstream cout("output.out");
ifstream cin("strmatch.in"); ofstream cout("strmatch.out");

//VARIABLES

const unsigned long long base = 167;
vector <int> vans;
ll ans;
unsigned long long H[2000005];

//FUNCTIONS



//MAIN

int main() {

	string a, b; cin >> a >> b;

	unsigned long long hsrch = 0;
	for (auto& x : a) {
		hsrch *= base;
		hsrch += x;
	}

	unsigned long long pow = 1;
	for (int i = 1; i <= a.size(); i++) {
		pow *= base;
	}

	for (int i = 1; i <= b.size(); i++) {
		H[i] = H[i - 1] * base;
		H[i] += b[i - 1];

		if (i < a.size()) {
			continue;
		}

		unsigned long long hash = H[i] - H[i - a.size()] * pow;

		if (hash == hsrch) {
			ans++;
			if (vans.size() < 1000) vans.push_back(i - a.size());
		}
	}

	cout << ans << '\n';
	for (auto& x : vans) {
		cout << x << ' ';
	}


	return 0;
}