#include"bits/stdc++.h"
using namespace std;
main()
{
int n;
int dem=0;
while(n!=0)
{
cin>>n;
if(n<0)
{
cout<<n<<" "; dem++; // neu n<0 dem tang len 1
}
}
if(dem==0) cout<<"NOT FOUND"<<endl;
}
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