#include <bits/stdc++.h>

#define prm(x) x.begin(), x.end()
#define srt(x) sort(prm(x))
#define rvs(x) reverse(prm(x))

using namespace std;
using ll = long long;
using ld = long double;

int main()
{
    ll tc;
    cin >> tc;
    while (tc-- > 0)
    {
        string s;
        cin.ignore();
        getline(cin, s);
        vector<list<char>> v{{}, {}};
        ll pos = 1;
        ll le = 0;
        ll ls = 0;
        char ads = ']';
        for (auto cl : s)
        {
            if (cl == ']' || cl == '[')
            {
                if (ads == ']')
                {
                    v.at(le).splice(v.at(le).end(), v.at(pos));
                    v.push_back({});
                    le = pos;
                    pos += 1;
                }
                else
                {
                    v.at(pos).splice(v.at(pos).end(), v.at(ls));
                    v.push_back({});
                    ls = pos;
                    pos += 1;
                }
            }
            else if (cl == '<')
            {
                if (!v.at(pos).empty())
                {
                    v.at(pos).pop_back();
                }
            }
            else
            {
                v.at(pos).push_back(cl);
            }
        }
        cout << 1 << endl;
        for (auto it = v.at(ls).begin(); it != v.at(ls).end(); it++)
        {
            cout << *it;
        }
        cout << endl;
    }
    return 0;
}