#include<bits/stdc++.h>
using namespace std;
int p[2003],d[2003];
bool ans[2003];
int f(int n){
    int sum=0;
    for(int i=1;i<=n;i++) sum+= (int) abs(i-d[i]);
    return sum/2;
}
int main()
{
    freopen("Shifts.in","r",stdin);
    freopen("Shifts.out","w",stdout);
    ios::sync_with_stdio(0);
    cin.tie(0);
    int T;cin>>T;
    while(T--){
        int n,sum=0;cin>>n;
        for(int i=1;i<=n;i++) cin>>p[i];
        for(int s=0;s<n;s++){
//            cout<<s<<": ";
//            for(int i=1;i<=n;i++) cout<<p[i]<<" ";
//            cout<<endl;
            for(int i=1;i<=n;i++) d[i]=p[i];
            int m=f(n),j=1;
            while(m&&j<=n){
                if(d[j]>d[j+1]){
                    swap(d[j],d[j+1]);
                    j--;m--;
                } else j++;
            }
            if(!f(n)) ans[s]=1,sum++;
            p[0]=p[n];
            for(int i=n;i>=1;i--) p[i]=p[i-1];
        }
        cout<<sum<<endl;
        for(int i=0;i<n;i++) if(ans[i]) cout<<i<<" ",ans[i]=0;
        cout<<endl;
    }
    return 0;
}