#include<fstream>
#include<string>
using namespace std;
ifstream fi("strmatch.in");
ofstream fo("strmatch.out");
string s,t;
int a[20000020],k=0,sol[10000000];
int main(){
	fi>>t>>s;
	for(int i=t.size();i;i--)t[i]=t[i-1];
	for(int i=s.size();i;i--)s[i]=s[i-1];
	int q=0;
	 a[0]=-1; a[1]=0;
	 
    for (int i=2; i<=t.size(); ++i){
        q=i-1;
        while (q>0&&t[a[q]+1]!=t[i]) q=a[q];
        a[i]=a[q]+1;
        }
        
/*	for(int i=2;i<=t.size();i++){
		while(q && t[q+1]!=t[i])q=a[q];
		if(t[q+1]==t[i])q++;
		a[i]=q;
	//	fo<<a[i]<<" ";
	}*/
//	fo<<endl;

	q=0;
	for(int i=1;i<=s.size();i++){
		while(q && t[q+1]!=s[i])q=a[q];
		if(t[q+1]==s[i])q++;
		if(q==t.size()){
			sol[++k]=i-q;
			q=a[q];
			
		}
	}
	fo<<k<<endl;
	for(int i=1;i<=k && i<=1001;i++)fo<<sol[i]<<" ";
	
}