// Problema Strmatch - InofArena ( www.infoarena.ro/problema/strmatch )
#include <cstdio>
#include <string>
#include <unordered_map>
#include <fstream>
#include <vector>

#define in "strmatch.in"
#define out "strmatch.out"
#define len 2000007
#define pb push_back

using namespace std;
ifstream cin(in);
ofstream cout(out);

int sze1, sze2, sze;
string str1, str2, tmp;
unordered_map <string, vector <int> > RabinKarp;

int main()
{
	cin >> str1 >> str2;
	sze1 = str1.size();
	sze2 = str2.size();
	for(int i = 0 ; i< sze2 - sze1 + 1; ++i)
	{
		tmp.replace(0, len, str2, i, sze1);
		RabinKarp[tmp].pb(i);
	}
	sze = RabinKarp[str1].size();
	cout << sze << "\n";
	for(int i = 0; i< sze; ++i)
	{
		cout << RabinKarp[str1][i] << " ";
	}
	cout << "\n";
}