#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 11;
const int inf = 1e9;
int a[N];
signed main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr); cout.tie(nullptr);
int T = 1;
cin >> T;
bitset < N > oh;
while(T--){
int n;
cin >> n;
for(int i = 1; i <= n; i++){
cin >> a[i];
}
vector < int > ans;
for(int k = 1; k <= n; k++){
int ok = 1, l = 1, sum = 0;
oh = 0;
oh[0] = 1;
for(int r = 1; r <= n; r++){
if(r - l + 1 > k){
sum -= a[l];
oh >>= a[l];
l++;
}
sum += a[r];
oh |= (oh << a[r]);
if(k <= r && (sum % 2 == 1 || oh[sum / 2] == 0)) {
ok = 0;
break;
}
}
if(ok) ans.push_back(k);
}
cout << ans.size() << ' ';
for(int i: ans) cout << i << ' ';
cout << '\n';
}
}
// hello karim nurbakyt sanzhar azamat congratulation europa asia america laplas
