#include <fstream>
#include <cstring>
using namespace std;
ifstream in("strmatch.in");
ofstream out("strmatch.out");
char a[2000100],b[2000100],x;
int i,n,m,k,j,nr,v[2000100],q;
int p[2000100];
int main()
{
    in.get(a,2000100);
    n=strlen(a);
    while(in>>x)
        b[k++]=x;
    j=0;
    i=1;
    while(i<n)
    {
       if(a[i]==a[j])
       {
           p[i]=j+1;
           i++;
           j++;
       }
       else {
        while(a[j]!=a[i]&&j>0)
           j=p[j-1];
           if(a[j]==a[i]) p[i]=j+1;
           else p[i]=0;
           i++;
       }
    }
    j=0;
    for(i=0;i<k;i++)
    {
       while(a[j]!=b[i]&&j>0) j=p[j-1];
       if(j==n-1)
       {
           v[++q]=i-n+1;
           j=p[j-1];
       }
          if(a[j]==b[i]) j++;
    }
    out<<q<<'\n';
    for(i=1;i<=min(q,1000);i++) out<<v[i]<<" ";
    return 0;
}