#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

#ifdef LOCAL
    #include <bits/debug.h>
#else
    #define dbg(...)
#endif

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);

    int T;
    cin >> T;

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

        ll ans = 0;
        vector<pair<int, int>> a(n);
        for (int i = 0; i < n; i++) {
            int l, r;
            cin >> l >> r;
            ans += r - l;
            a[i] = {l, i};
        }

        sort(a.begin(), a.end());
        ans += max(0, a[0].first - f);

        cout << ans << endl;
        for (int i = 0; i < n; i++) {
            cout << a[i].second + 1 << " \n"[i == n - 1];
        }
    }
    
    return 0;
}