#include <bits/stdc++.h>
using namespace std;

#define _p(...) (void)printf(__VA_ARGS__)
#define forr(x,arr) for(auto&& x:arr)
#define _overload3(_1,_2,_3,name,...) name
#define _rep2(i,n) _rep3(i,0,n)
#define _rep3(i,a,b) for(int i=int(a);i<int(b);++i)
#define rep(...) _overload3(__VA_ARGS__,_rep3,_rep2,)(__VA_ARGS__)
#define _rrep2(i,n) _rrep3(i,0,n)
#define _rrep3(i,a,b) for(int i=int(b)-1;i>=int(a);i--)
#define rrep(...) _overload3(__VA_ARGS__,_rrep3,_rrep2,)(__VA_ARGS__)
#define ALL(x) (x).begin(), (x).end()
#define BIT(n) (1LL<<(n))
#define SZ(x) ((int)(x).size())
#define fst first
#define snd second
using ll=long long;using pii=pair<int,int>;using vb=vector<bool>;
using vi=vector<int>;using vvi=vector<vi>;using vvvi=vector<vvi>;
using vl=vector<ll>;using vvl=vector<vl>;using vvvl=vector<vvl>;
using vd=vector<double>;using vvd=vector<vd>;using vvvd=vector<vvd>;
using vpii=vector<pii>;using vvpii=vector<vpii>;using vvvpii=vector<vvpii>;

char b(int x) { return x ? '#' : '.'; }

bool query(string& x, string& y) {
  cout << x << endl << y << endl;
  fflush(stdout);
  string res;
  cin >> res;
  if (res == "end") {
    exit(0);
  }
  return res == "T";
}

void Main() {
  int N;
  cin >> N;

  string s1, s2;

  rep(i, 4) {
    s1 = b(i & 1);
    s2 = b(i & 2);
    if (query(s1, s2)) {
      break;
    }
  }

  while (1) {
    bool ok = 0;
    rep(i, 4) {
      string q1 = s1 + b(i & 1);
      string q2 = s2 + b(i & 2);
      if (query(q1, q2)) {
        ok = 1;
        s1 = q1;
        s2 = q2;
        break;
      }
    }
    if (!ok) break;
  }

  while (1) {
    bool ok = 0;
    rep(i, 4) {
      string q1 = b(i & 1) + s1;
      string q2 = b(i & 2) + s2;
      if (query(q1, q2)) {
        ok = 1;
        s1 = q1;
        s2 = q2;
        break;
      }
    }
    if (!ok) break;
  }
}

int main() {
  //cin.tie(0); ios::sync_with_stdio(false);
  Main();
  return 0;
}
