#include <iostream>
using namespace std;
int N,ar[110],A;
int main()
{
while(true)
{
cin>>N;
if(N==0) return 0;
for(int x=0; x<N; x++)
{
cin>>ar[x];
}
cout<<ar[0]<<" ";
for(int x=1; x<N; x++)
{
if(ar[x]!=ar[x-1]) cout<<ar[x]<<" ";
}
cout<<"$\n";
}
}