#include <bits/stdc++.h>
#define int long long
using namespace std;
const int N = 1e5 + 11;
const int inf = 1e18;
int a[N];
signed main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr); cout.tie(nullptr);
int T = 1;
cin >> T;
while(T--){
int n;
cin >> n;
for(int i = 1; i <= n; i++){
cin >> a[i];
}
bitset < N > oh;
vector < int > ans;
for(int k = 1; k <= n; k++){
int ok = 1;
for(int r = k; r <= n; r++){
oh &= 0;
oh[0] = 1;
int sum = 0;
for(int i = r - k + 1; i <= r; i++){
sum += a[i];
oh |= (oh << a[i]);
}
if((oh[sum / 2] == 0 || sum&1)){
ok = 0;
}
}
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
