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#include <bits/stdc++.h>
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
const int N=2000010;
char a[N], b[N];
int n, m, p[N], q, k, i, sol[1010];
int main()
{
f>>(a+1)>>(b+1);
n=strlen(a+1);
m=strlen(b+1);
for(i=2;i<=n;i++)
{
while(q>0 && a[i]!=a[q+1])
q=p[q];
if(a[i]==a[q+1])
q++;
p[i]=q;
}
q=0;
for(i=1;i<=m;i++)
{
while(q>0 && b[i]!=a[q+1])
q=p[q];
if(b[i]==a[q+1])
q++;
if(q==n)
{
k++;
if(k<=1000)
sol[k]=i-n;
}
}
g<<k<<'\n';
k=min(k,1000);
for(i=1;i<=k;i++)
g<<sol[i]<<" ";
return 0;
}