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#include<fstream>
#include<string>
using namespace std;
ifstream fi("strmatch.in");
ofstream fo("strmatch.out");
string s,t;
int a[2000020],k=0,sol[1000000];
int main(){
fi>>t>>s;
// for(int i=t.size(),i;i--)t[i]=t[i-1];
// for(int i=s.size(),i;i--)s[i]=s[i-1];
int q=0;
a[0]=0;
for(int i=1;i<t.size();i++){
while(q && t[q]!=t[i])q=a[q];
if(t[q]==t[i])q++;
a[i]=q;
// fo<<a[i]<<" ";
}
// fo<<endl;
q=0;
for(int i=0;i<s.size();i++){
while(q && t[q]!=s[i])q=a[q];
if(t[q]==s[i])q++;
if(q==t.size()){
sol[++k]=i-q+1;
q=a[q-1];
}
}
fo<<k<<endl;
for(int i=1;i<=k && i<=1000;i++)fo<<sol[i]<<" ";
}