#include <iostream>
#include <vector>
#include <queue>
#include <limits>

using namespace std;

const int INF = numeric_limits<int>::max();
const int NIL = 0;

vector<vector<int>> adjList;
vector<int> dist, match, level;

bool bfs(int n) {
    queue<int> q;

    for (int u = 1; u <= n; u++) {
        if (match[u] == NIL) {
            dist[u] = 0;
            q.push(u);
        } else {
            dist[u] = INF;
        }
    }

    while (!q.empty()) {
        int u = q.front();
        q.pop();

        if (dist[u] < dist[NIL]) {
            for (int v : adjList[u]) {
                if (dist[match[v]] == INF) {
                    dist[match[v]] = dist[u] + 1;
                    q.push(match[v]);
                }
            }
        }
    }

    return dist[NIL] != INF;
}

bool dfs(int u) {
    if (u == NIL) {
        return true;
    }

    for (int v : adjList[u]) {
        if (dist[match[v]] == dist[u] + 1 && dfs(match[v])) {
            match[u] = v;
            match[v] = u;
            return true;
        }
    }

    dist[u] = INF;
    return false;
}

int hopcroftKarp(int n) {
    dist.resize(n + 1);
    match.resize(n + 1);
    level.resize(n + 1);

    int matching = 0;

    while (bfs(n)) {
        for (int u = 1; u <= n; u++) {
            if (match[u] == NIL && dfs(u)) {
                matching++;
            }
        }
    }

    return matching;
}

int main() {
    int T;
    cin >> T;

    while (T--) {
        int n;
        cin >> n;

        vector<int> a(n + 1);
        for (int i = 1; i <= n; i++) {
            cin >> a[i];
        }

        // 构建图的邻接表表示
        adjList.clear();
        adjList.resize(n + 1);

        for (int i = 1; i <= n; i++) {
            for (int j = i + 1; j <= n; j++) {
                if (abs(i - j) == abs(a[i] - a[j])) {
                    adjList[i].push_back(j);
                    adjList[j].push_back(i);
                }
            }
        }

        // 使用Hopcroft-Karp算法求解完美匹配
        int matching = hopcroftKarp(n);

        if (matching == n / 2) {
            cout << "匐卙卥即匑" << endl;

            for (int u = 1; u <= n; u++) {
                if (u < match[u]) {
                    cout << u << " " << match[u] << endl;
                }
            }
        } else {
            cout << "匐华卯匑" << endl;
        }
    }

    return 0;
}