#include <fstream>
#include <vector>
#include <cstring>
#define NMAX 2000005

using namespace std;

char s1[NMAX],s2[NMAX];
int ant[NMAX];
int n,m,i,k,nr,l1,l2;
vector<int>sol;
void prefix()
{
    int i;
    k=0;ant[1]=0;
    for(i=2;i<=l1;++i)
    {
        while(s1[k+1]!=s1[i] && k>0) k=ant[k];
        if(s1[k+1] == s1[i]) ++k;
        ant[i]=k;
    }
}

int main()
{
   ifstream f("strmatch.in");
   ofstream g("strmatch.out");
   f.getline(s1+1,NMAX);
   f.getline(s2+1,NMAX);
   l1=strlen(s1+1);
   l2=strlen(s2+1);
   prefix();
   k=0;
   for(i=1; i<=l2; ++i)
   {
       while(s1[k+1] != s2[i] && k>0) k=ant[k];
       if(s1[k+1] == s2[i]) ++k;
       if(k == l1)
       {
           ++nr;
           if(nr <= 1000)
           {
               sol.push_back(i-l1);
           }
       }
   }

   g<<nr<<"\n";
   for(i=0; i<sol.size(); ++i)
        g<<sol[i]<<" ";
   return 0;
}