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#include <bits/stdc++.h>
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
string s,t;
vector <int> rez;
int k;
int main()
{
f>>s>>t;
vector <int> pi(s.size());
pi[0]=0;
for(int i=1;i<s.size();i++)
{
while(k>0 && s[k]!=s[i])
{
k=pi[k-1];
}
if(s[k]==s[i])
k++;
pi[i]=k;
}
vector <int> pi2(t.size());
k=0;
for(int i=0;i<t.size();i++)
{
while(k>0 && s[k]!=t[i])
{
k=pi[k-1];
}
if(s[k]==t[i])
k++;
pi2[i]=k;
if(k==s.size())
rez.push_back(i-k+1);
}
g<<rez.size()<<'\n';
if(rez.size()>1000)
for(int i=0;i<1000;i++)
g<<rez[i]<<" ";
else
for(int i=0;i<rez.size();i++)
g<<rez[i]<<" ";
return 0;
}