#include <stdio.h>
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
using namespace std;

string a, b;
vector <int> rez;

long p1 = 3, win1 = 10000, p2 = 5, win2 = 9000, alen, blen, b_hash1, a_hash1, rez_size, def_power1, power1, power2, def_power2, a_hash2, b_hash2;

int main ()
{
	//freopen ("strmatch.in", "rt", stdin);
	//freopen ("strmatch.out", "wt", stdout);
	ifstream f("strmatch.in");
	ofstream g("strmatch.out");

	cin.sync_with_stdio(false);
	f>>a;
	f>>b;

	a_hash1 = 0;
	b_hash1 = 0;
	alen = a.size();
	blen = b.size();
	power1 = 1;
	for (long i = alen - 1; i >= 0; --i)
	{
		a_hash1 += a[i] * power1;
		b_hash1 += b[i] * power1;
		def_power1 = power1;
		power1 *= p1;
		a_hash1 %= win1;
		b_hash1 %= win1;
		power1 %= win1;
	}

	a_hash2 = 0;
	b_hash2 = 0;
	power2 = 1;
	for (long i = alen - 1; i >= 0; --i)
	{
		a_hash2 += a[i] * power2;
		b_hash2 += b[i] * power2;
		def_power2 = power2;
		power2 *= p2;
		a_hash2 %= win2;
		b_hash2 %= win2;
		power2 %= win2;
	}

	for (long i = alen; i < blen; ++i)
	{
		if (a_hash1 == b_hash1 && a_hash2 == b_hash2)
		{
			rez.push_back(i);
		}

		b_hash1 += (win1 - (def_power1 * b[i - alen] % win1));
		b_hash1 %= win1;
		if (b_hash1 < 0) 
			b_hash1 += win1;
		b_hash1 *= p1;
		b_hash1 += b[i];
		b_hash1 %= win1;

		b_hash2 += (win2 - (def_power2 * b[i - alen] % win2));
		b_hash2 %= win2;
		if (b_hash2 < 0) 
			b_hash2 += win2;
		b_hash2 *= p2;
		b_hash2 += b[i];
		b_hash2 %= win2;
	}

//	printf("%ld\n", rez.size());
	g<<rez.size()<<endl;
	rez_size = rez.size();
	for (long i = 0; i < rez_size && i < 1000; ++i)
//		printf("%ld ", rez[i] - alen);
		g<<rez[i] - alen<<" ";
	g<<endl;
	return 0;
}