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#include <bits/stdc++.h>
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
int urm[2000005],n,k,q,m,sol[1005],i,p;
char N[2000005],M[2000005];
int main()
{
f>>N;
n=strlen(N);
for(i=2;i<=n;i++)
{
while(k>0&&N[k]!=N[i-1]) k=urm[k];
if(N[k]==N[i-1]) k++;
urm[i]=k;
}
f>>M;
m=strlen(M);
for(i=0;i<m;i++)
{
while(q>0&&N[q]!=M[i]) q=urm[q];
if(N[q]==M[i]) q++;
if(q==n)
{
p++;
if(p<=1000)
{
sol[p]=i;
}
}
}
g<<p<<'\n';
for(i=1;i<=min(p,1000);i++) g<<sol[i]-n+1<<" ";
return 0;
}