#include <bits/stdc++.h>

using namespace std;
#define int long long

#define pii pair<int, int>
signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int n;
    std::cin >> n;
    std::vector<int> a(2 * n + 1), q1(n + 1), q2(n + 1);
    map<int, int> mp, is;
    std::vector<int> ans(n + 1);
    priority_queue<pii> hp1, hp2;
    for (int i = 1; i <= 2 * n; i++) {
        std::cin >> a[i];
    }
    for (int i = 1; i <= 2 * n; i++) {
        if(a[i] > 0) {
            hp1.push({i, a[i]});
            is[a[i]] = 1;
        } else {
            a[i] *= -1;
            if(!is[a[i]]) {
                cout << "*\n";
                return 0;
            }
            if(is[a[i]] == 1) {
                while(hp1.size()) {
                    auto [id, x] = hp1.top();
                    hp1.pop();
                    if(x != a[i]) {
                        hp2.push({id, x});
                        is[x] = 2;
                    } else {
                        ans[a[i]] = 1;
                        break;
                    }
                }
            } else {
                if(hp2.top().second == a[i]) {
                    hp2.pop();
                    ans[a[i]] = 2;
                } else {
                    cout << "*\n";
                    return 0;
                }
            }
        }
    }
    for (int i = 1; i <= n; i++) {
        std::cout << " GS"[ans[i]];
    }
    std::cout << "\n";
    return 0;
}