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#include <bits/stdc++.h>
using namespace std;
ifstream fin ("strmatch.in");
ofstream fout ("strmatch.out");
const int nmax=2e6+5;
int m, z[2*nmax], rez[1005];
string s, t;
int main()
{
fin >> s >> t;
int n=s.size();
s=s+"#"+t;
int best=0;
for (int i=1; i<s.size(); i++)
{
if (i<=best+z[best]-1)
z[i]=min(z[i-best],best+z[best]+i);
while (i+z[i]<s.size() && s[z[i]]==s[i+z[i]])
z[i]++;
if (i+z[i]-1>best+z[best]-1)
best=i;
if (z[i]==n)
{
m++;
if (m<=1000)
rez[m]=i-n-1;
}
}
fout << m << '\n';
for (int i=1; i<=min(m,1000); i++)
fout << rez[i] << ' ';
return 0;
}