#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
char a[2000005],b[2000005];
int pi[2000005],d[2000005],i,j,ct,k,m,n,x,y;
int main()
{a[0]=' ';
 b[0]=' ';
 fin.getline(a+1,2000003);
 fin.getline(b+1,2000003);
 pi[1]=0;
 m=strlen(b)-1;
 n=strlen(a)-1;
  for(i=2;i<=n;i++)
    {while(k>0&&a[i]!=a[k+1])k=pi[k];
     if(a[i]==a[k+1])k++;
     pi[i]=k;
    }k=0;
    if(m>1000)m=1000;
 for(i=1;i<=m;i++)
    {while(k>0&&b[i]!=a[k+1])k=pi[k];
     if(b[i]==a[k+1])k++;
     d[i]=k;
     if(d[i]==n)ct++;
    }
 fout<<ct<<"\n";
 for(i=1;i<=m;i++)
    {if(d[i]==n)fout<<i-n+1<<" ";
    }
}