#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 pow;
long long ha, hb;

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