#include <fstream>
#include <cstring>
using namespace std;
int n,p[2000001],sol[1000],ns;
char a[2000001],b[2000001];
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
int main()
{
	int i,q;
	fin>>(a+1)>>(b+1);
	n=strlen(a+1);
	for(i=2,q=0;a[i];++i)
	{
		while(q && a[q+1]!=a[i])
			q=p[q];
		if(a[q+1]==a[i])
			++q;
		p[i]=q;
	}
	for(i=1,q=0;b[i];++i)
	{
		while(q && a[q+1]!=b[i])
			q=p[q];
		if(a[q+1]==b[i])
			++q;
		if(q==n)
		{
			q=p[n];
			if(ns<1000)
				sol[ns]=i-n;
			++ns;
		}
	}
	fout<<ns<<"\n";
	ns=min(ns,1000);
	for(i=0;i<ns;++i)
		fout<<sol[i]<<" ";
	fout<<"\n";
	return 0;
}