#include <bits/stdc++.h>

using namespace std;

ifstream in("strmatch.in");
ofstream out("strmatch.out");

unsigned long long B=127;

string a,b;
unsigned long long hashA,hashB,powe;
unsigned long long sol;
vector<unsigned int> ans;
void make_hash()
{
	powe=1;
	for(unsigned long long i=0;i<a.length();i++)
	{
		hashA=(hashA * B + a[i]);
		powe=(powe * B);
	}
	for(unsigned long long i=0;i<a.length();i++)
		hashB=(hashB * B + b[i]);
}

int main()
{
	in>>a>>b;
	if(a.size()>b.size())
	{
		out<<"0";
		return 0;
	}
	make_hash();
	if(hashA == hashB)
	{
		sol++;
		ans.push_back(0);
	}
	for(unsigned int i=1;i<=b.size()-a.size();i++)
	{
		hashB=(hashB * B+b[i+a.size()-1]);
		unsigned long long aux=(powe * b[i-1]);
		hashB=(hashB-aux);
		if(hashA==hashB)
		{
			sol++;
			if(ans.size()<=1000)
				ans.push_back(i);
		}
	}
	out<<sol<<"\n";
	for(int i=0;i<min(1000,(int)ans.size());i++)
		out<<ans[i]<<" ";
	return 0;
}