#include<fstream.h>
#include<iostream.h>
#include<string.h>


int main()
{
char a[2000001],b[2000001];
int i,k,c,v[1001],pi[2000001],la,lb,ok=1;

ifstream fin("strmatch.in");
ofstream fout("strmatch.out");

fin.getline(b,2000001);
fin.getline(a,2000001);

la=strlen(a);
lb=strlen(b);
c=0;

k=-1;
for(i=1;i<lb;i++)
   {
   while(k>=0 && b[k+1]!=b[i])k=pi[k];
   if(b[k+1]==b[i])k++;
   pi[i]=k;
   }

k=-1;
for(i=1;i<la;i++)
   {
   while(k>=0 && b[k+1]!=a[i])k=pi[k];
   if(b[k+1]==a[i])k++;
   if(k+1==lb){
              c++;
              if(c==1000)ok=0;
              if(ok)v[c]=i-lb+1;
              }
   }

fout<<c<<'\n';
for(i=1;i<=c && i<=1000;i++)fout<<v[i]<<' ';   

return 0;
}