#include<fstream>
#include<cstring>
//#include<iostream>
using namespace std;
ifstream cin("strmatch.in");
ofstream cout("strmatch.out");
int urm[2000001];
char t[20000001],P[20000001];
int n,m;
void urmatorul(char *p)
{
    int k=-1,x;
    urm[0]=0;
    for(x=1;x<m;x++)
    {
        while(k>0&&p[k+1]!=p[x])
            k=urm[k];
        if(p[k+1]==p[x])    k++;
        urm[x]=k;
    }
}
int poz[1002];
int main() {
   int i,x=-1,p1=0;
   cin.getline(P,2000002);
   cin.getline(t,2000002);
   n=strlen(t);
   m=strlen(P);
   urmatorul(P);
   for(i=0;i<n;i++)
   {
       while(x>0&&P[x+1]!=t[i])x=urm[x];
       if(P[x+1]==t[i])x++;
       if(x==m-1)
       {
           p1++;
           if(p1<=1000)
           poz[p1]=i-m+1;

           x=urm[x];
       }
   }
   cout<<p1<<'\n';
if(p1>1000)
    p1=1000;
  for(i=1;i<=p1;i++)
       cout<<poz[i]<<' ';
}