#include<fstream>
#include<string>
#include<sstream>
#define P 101
#define MOD 100000007
using namespace std;

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

int i,j,s;
stringstream result;
string a,b;
long long ha, hb;

long long pow(int n, int p)
{
	unsigned long long a=n;
	unsigned long long sol=1;
	for(int i=0; (1<<i) <= p; ++i)
	{
		if(((1<<i)&p) > 0)
			sol=sol*a;
		a=a*a;
	}
	return sol;
}

int main()
{
	fin>>a;
	fin>>b;
	if(a.length()>b.length())
	{
		fout<<0;
		return 0;
	}
	for(i=0; i<a.length(); ++i)
		ha+=(pow(P,a.length()-i-1)*a[i]);
	for(i=0; i<a.length(); ++i)
		hb+=(pow(P,a.length()-i-1)*b[i]);
	for(i=0; i<b.length()-a.length()+1; ++i)
	{
		if(ha==hb)
		{
			bool q=true;
			if(q){
				if(s<1000)
					result<<i<<" ";
				s++;
			}
		}
		hb=P*(hb-pow(P, a.length()-1)*b[i]) + b[i+a.length()];
	}
	fout<<s<<endl;
	fout<<result.str();
	return 0;
}