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#include <bits/stdc++.h>
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
constexpr int valoare=4e6+5;
char a[valoare],b[valoare];
int n,m,i,j,phi[valoare],sol[valoare],nr_sol;
int main()
{
f>>a>>b;
m=strlen(a);
strcat(a,"#");
strcat(a,b);
n=strlen(a);
int rez=0;
for(i=1;i<n;i++)
{
while(rez && a[rez]!=a[i])
{
rez=phi[rez-1];
}
if(a[rez]==a[i])
{
++rez;
}
phi[i]=rez;
}
for(int i=m+1;i<n;i++)
{
if(phi[i]==m)
{
sol[++nr_sol]=i-m+1;
}
}
g<<nr_sol<<'\n';
for(int i=1;i<=min(nr_sol,1000);i++)
{
g<<sol[i]-m-1<<' ';
}
g<<'\n';
return 0;
}