#include<fstream>
#include<string>
using namespace std;
int pi[2000030],poz[1005];
long rez=0;
ifstream in("strmatch.in");
ofstream out("strmatch.out");
void prefix(string s)
{
int k=-1,n,i;
n=s.size();
pi[0]=-1;
for(i=1;i<n;i++)
 {
   while(k>-1 && s[k+1]!=s[i])
      k=pi[k];
	
	 if(s[k+1]==s[i])
		 k++;
	
	pi[i]=k;
 }
}

void kmp(string S,string s)
{
int i,k=-1,m,n;
m=S.size();
n=s.size();
for(i=0;i<m;i++)
 {
    while(k>-1 && s[k+1]!=S[i])
		k=pi[k];
	
	if(s[k+1]=S[i])
		k++;
	
	if(k==n-1)
	 {
	      rez++;
          if(rez<=1001) poz[rez]=i-n+1; 		  
	 }

 }

}
int main()
{
string s,S;
in>>s;
in>>S;
prefix(s);
kmp(S,s);
out<<rez;
out<<endl;
if(rez>1001) rez=1001;
for(int i=1;i<=rez;i++)
	out<<poz[i]<<" ";
return 0;	
}