#include <bits/stdc++.h>

using namespace std;

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

unsigned long long MOD=666013;
unsigned long long B=700001;

string a,b;
unsigned long long hashA,hashB,powe;
unsigned long long sol;
int ans[1005],poz;
void make_hash()
{
	powe=1;
	for(unsigned long long i=0;i<a.length();i++)
	{
		hashA=(hashA * B + a[i]) % MOD;
		powe=(powe * B) % MOD;
	}
	for(unsigned long long i=0;i<a.length();i++)
		hashB=(hashB * B + b[i]) % MOD;
}

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