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#include <bits/stdc++.h>
#define NMAX 5020200
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
string s,a;
int j, lps[NMAX],cnt,nr,i=1;
int main()
{
fin>>a>>s;
s="A"+a+'#'+s;
while(i<s.size())
{
if(s[i]==s[j+1] && j+1<i)
{
++j;
lps[i++]=j;
if(j==a.size())
++nr;
}
else
{
if(j==0)
lps[i++]=0;
j=lps[j];
}
}
// for(int i=1;i<=s.size();++i)
// cout<<s[i]<<" ";
// cout<<'\n';
// for(int i=1;i<=s.size();++i)
// cout<<lps[i]<< " ";
fout<<nr<<'\n';
nr=min(nr, 1000);
for(int i=a.size()+2;i<=s.size() && cnt<=nr;++i)
if(lps[i]==a.size())
{
fout<<i-2*a.size()-1<<" ";
++cnt;
}
return 0;
}