#include <bits/stdc++.h>

using namespace std;
int cur_num = 1;
int main() {
    vector<int> g1, g2;
    int n;
    cin >> n;
    string s;
    cin >> s;
    for (int i = 0; i < (int)s.size(); i++) {
        if (s[i] == 'a') {
            g1.push_back(cur_num++);
        }
        if (s[i] == 'b') {
            g2.push_back(cur_num++);
        }
        if (s[i] == 'A') {
            cout << g1[0] % 10 << "";
            g1.erase(g1.begin(), g1.begin() + 1);

        }
        if (s[i] == 'B') {
            cout << g2[0] % 10 << "";
            g2.erase(g2.begin(), g2.begin() + 1);
        }
        if (s[i] == '>') {
            reverse(g1.begin(), g1.end());
            for (auto i : g1)
                g2.push_back(i);
            g1.resize(0);
        }
        if (s[i] == '<') {
            int mid = g2.size() / 2;
            for (int j = 0; j < mid; j++) {
                g1.push_back(g2.back());
                g2.pop_back();
            }
        }
        if (s[i] == '[') {
            int mid = g1.size() / 2;
            for (int j = 0; j < mid; j++) {
                g2.push_back(g1.back());
                g1.pop_back();
            }
        }
        if (s[i] == ']') {
            reverse(g2.begin(), g2.end());
            for (auto i : g2)
                g1.push_back(i);
            g2.resize(0);
        }
    }

	return 0;
}