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#include <bits/stdc++.h>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
char s1[2000009],s2[2000009];
int prefix[2000009],ans[1009],k;
void pre()
{
int j=0;
for(int i=1;i<strlen(s1);i++)
{
while(s1[j]!=s1[i]&&j!=0)
j=prefix[j-1];
if(s1[i]==s1[j])
prefix[i]=++j;
}
}
int main()
{
fin>>s1>>s2;
pre();
int j=0;
for(int i=0;i<strlen(s2);i++)
{
while(s1[j]!=s2[i]&&j!=0)
j=prefix[j-1];
if(s1[j]==s2[i])
j++;
if(j==strlen(s1))
{
if(k<=1000)
ans[++k]=i-j+1;
j=prefix[j-1];
}
}
fout<<k<<'\n';
for(int i=1;i<=min(1000,k);i++)
fout<<ans[i]<<' ';
}