#pragma GCC optimize ("O3")
#include<bits/stdc++.h>

using namespace std;

int main() {
    //freopen("in.txt", "r", stdin);
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n;
    cin >> n;
    int idx = 1;

    deque<int> a;
    deque<int> b;

    for (int i = 0; i < n; ++i) {
        char ch;
        cin >> ch;
        if (ch == 'a') {
            a.push_back((idx++) % 10);
        }
        if (ch == 'b') {
            b.push_back((idx++)% 10);
        }
        if (ch == 'A') {
            cout << a.front();
            a.pop_front();
        }
        if (ch == 'B') {
            cout << b.front();
            b.pop_front();
        }
        if (ch == '>') {
            while (a.size() > 0) {
                b.push_back(a.back());
                a.pop_back();
            }
        }
        if (ch == '<') {
            while ((int)b.size() - 1 >= (int)a.size() + 1) {
                a.push_back(b.back());
                b.pop_back();
            }
        }
        if (ch == ']') {
            while (!b.empty()) {
                a.push_back(b.back());
                b.pop_back();
            }
        }
        if (ch == '[') {
            while ((int)a.size() - 1 >= (int)b.size() + 1) {
                b.push_back(a.back());
                a.pop_back();
            }
        }
    }
}