#include <bits/stdc++.h>
using namespace std;
/*#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template<typename T> using gpp_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T, typename L> using gpp_map = tree<T, L, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T> using gpp_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;*/
struct fast_ios { fast_ios(){ cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_;
#define FOR(i, begin, end) for(int i=(begin);i<(end);i++)
#define REP(i, n) FOR(i,0,n)
#define IFOR(i, begin, end) for(int i=(end)-1;i>=(begin);i--)
#define IREP(i, n) IFOR(i,0,n)
#define Sort(v) sort(v.begin(), v.end())
#define Reverse(v) reverse(v.begin(), v.end())
#define all(v) v.begin(),v.end()
#define SZ(v) ((int)v.size())
#define Lower_bound(v, x) distance(v.begin(), lower_bound(v.begin(), v.end(), x))
#define Upper_bound(v, x) distance(v.begin(), upper_bound(v.begin(), v.end(), x))
#define Max(a, b) a = max(a, b)
#define Min(a, b) a = min(a, b)
#define bit(n) (1LL<<(n))
#define bit_exist(x, n) ((x >> n) & 1)
#define debug(x) cout << #x << "=" << x << endl;
#define vdebug(v) cout << #v << "=" << endl; REP(i_debug, v.size()){ cout << v[i_debug] << ","; } cout << endl;
#define mdebug(m) cout << #m << "=" << endl; REP(i_debug, m.size()){ REP(j_debug, m[i_debug].size()){ cout << m[i_debug][j_debug] << ","; } cout << endl;}
#define Return(ans) { cout << (ans) << endl; return 0; }
#define pb push_back
#define f first
#define s second
#define int long long
#define INF 1000000000000000000
template<typename T> istream &operator>>(istream &is, vector<T> &v){ for (auto &x : v) is >> x; return is; }
template<typename T> ostream &operator<<(ostream &os, vector<T> &v){ for(int i = 0; i < v.size(); i++) { cout << v[i]; if(i != v.size() - 1) cout << endl; }; return os; }
template<typename T1, typename T2> ostream &operator<<(ostream &os, pair<T1, T2> p){ cout << '(' << p.first << ',' << p.second << ')'; return os; }
template<typename T> void Out(T x) { cout << x << endl; }
template<typename T1, typename T2> void Ans(bool f, T1 y, T2 n) { if(f) Out(y); else Out(n); }

using vec = vector<int>;
using mat = vector<vec>;
using Pii = pair<int, int>;
using PiP = pair<int, Pii>;
using PPi = pair<Pii, int>;
using bools = vector<bool>;
using pairs = vector<Pii>;

//int dx[4] = {1,0,-1,0};
//int dy[4] = {0,1,0,-1};
//char d[4] = {'D','R','U','L'};

const int mod = 1000000007;
//const int mod = 998244353;
//#define Add(x, y) x = (x + (y)) % mod
//#define Mult(x, y) x = (x * (y)) % mod

void ask(vec A){
    cout << "?";
    for(int x: A) cout << " " << x + 1;
    cout << endl;
}

signed main(){

    int N; cin >> N;

    vec res(2 * N, 0), ans(2 * N, 0);
    int i1 = 0, i2 = N;
    vec a(N);
    REP(i, N) a[i] = i;
    ask(a);
    string T; cin >> T;
    if(T == "Red") res[0] = 1;
    else res[0] = -1;
    res[N] = -res[0];
    while(i2 - i1 > 1){
        int im = (i1 + i2) / 2;
        REP(i, N) a[i] = im + i;
        ask(a);
        cin >> T;
        if(T == "Red") res[im] = 1;
        else res[im] = -1;

        if(res[im] == res[i1]) i1 = im;
        else i2 = im;
    }
    int i0 = i1;
    ans[i0] = res[i0];
    ans[i0 + N] = res[i0 + 1];

    //debug(i0);
    vec A;
    REP(i, 2 * N) if(i < i0 || i > i0 + N) A.pb(i);
    A.pb(-1);
    FOR(i, i0 + 1, i0 + N){
        A[N - 1] = i;
        ask(A);
        cin >> T;
        if(T == "Red") ans[i] = 1;
        else ans[i] = -1;
    }

    A.resize(0);
    FOR(i, i0 + 1, i0 + N) A.pb(i);
    A.pb(-1);
    FOR(i, 0, 2 * N) if(i < i0 || i > i0 + N){
        A[N - 1] = i;
        ask(A);
        cin >> T;
        if(T == "Red") ans[i] = 1;
        else ans[i] = -1;
    }

    string x = "";
    REP(i, 2 * N){
        if(ans[i] == 1) x += 'R';
        else x += 'B';
    }
    cout << "! " << x << endl;

    return 0;
}


Measured memory_bytes: 724