#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx")
#include <bits/stdc++.h>
#define rep(i,n) for(int i=1;i<=n;++i)
#define pb push_back
#define mp make_pair
using namespace std;
int a[2][1100],top[2],v[1100],q[1100],tot;
int n;
int main()
{
    cin>>n;
    memset(v,255,sizeof(v)); getchar();
    rep(i,2*n)
    {
        if (i!=1)getchar();
        char c=getchar();
        int x; scanf("%d",&x);
        //cout<<c<<" "<<x<<":"<<endl;
        if (c=='+')
        {
            v[x]=2;
            q[++tot]=x;
            continue;
        }
        if (c=='-')
        {
            if (v[x]==-1){ puts("*"); return 0; }
            if (v[x]==2)
            {
                int p=tot;
                while (q[p]!=x)p--;
                v[x]=0;
                a[0][++top[0]]=x;
                q[p]=0;
                for(int j=p+1;j<=tot;j++)
                {
                    v[q[j]]=1;
                    a[1][++top[1]]=q[j];
                    q[j]=0;
                }
                tot=p-1;
            }
            if (a[v[x]][top[v[x]]]!=x){ puts("*"); return 0; }
            a[v[x]][top[v[x]]]=0;
            top[v[x]]--;
            //cout<<v[x]<<endl;
        }
    }
    rep(i,n)if (v[i]==0)putchar('G'); else putchar('S'); puts("");
    return 0;
}