#include <fstream>
#include <string>

using namespace std;

ifstream fi("strmatch.in");
ofstream fo("strmatch.out");

string a,b;
long h1,k1,h2,k2,n,m,i,v[1001],vn;
const long mod1=10000021,mod2=90007;


int main(){
	
	fi >> a >> b; n = a.size(); m = b.size();
	if (n>m) { fo << "0\n"; return 0; }
	
	for (i=0; i<n; i++){
		k1 = (k1+a[i])%mod1; k2 = (k2+a[i])%mod2;
		h1 = (h1+b[i])%mod1; h2 = (h2+b[i])%mod2;
	}
	
	if ((k1==h1)&&(k2==h2)&&(b.substr(0,n)==a)) vn++;
	
	for (i=n; i<m && vn<1000; i++){
		h1 = (h1-b[i-n]+b[i])%mod1; h2 = (h2-b[i-n]+b[i])%mod2;
		if ((k1==h1)&&(k2==h2)&&(b.substr(i-n+1,n)==a)) v[vn++] = i-n+1;
	}
	
	fo << vn << "\n";
	for (i=0; i<vn; i++) fo << v[i] << " ";
	
	return 0;
}