#include<bits/stdc++.h>

using namespace std;

int main() {
    int t; cin >> t;
    while(t--) {
        int n, k; cin >> n >> k;
        string s; cin >> s;
        int cur = k - 1;
        string ans = "";
        for (int i = 0; i < cur; ++i) {
            ans += "()";
        }
        int d = s.size() - 2 * cur;
        for (int i = 0; i < d / 2; ++i) {
            ans += "(";
        }
        for (int i = 0; i < d / 2; ++i) {
            ans += ")";
        }
        vector<pair<int, int> > res;
        for (int i = 0; i < n; ++i) {
            if (s[i] == ans[i]) {
                continue;
            }
            int cr = -1;
            for (int j = i; j < n; ++j) {
                if (s[j] == ans[i]) {
                    cr = j;
                    break;
                }
            }
            reverse(s.begin() + i, s.begin() + cr + 1);
            res.push_back({i + 1, cr + 1});
        }
        cout << res.size() << '\n';
        for (int i = 0; i < res.size(); ++i) {
            cout << res[i].first << ' ' << res[i].second << '\n';
        }
    }
    return 0;
}