import java.io.*;
import java.util.*;
import java.util.function.Function;

public class Main {

    static long N, A;

    public static void main(String[] args) {
        FastScanner sc = new FastScanner(System.in);
        N = sc.nextLong();

        solve((values) -> {
            StringBuilder s1 = new StringBuilder();
            StringBuilder s2 = new StringBuilder();
            for (Integer i : values) {
                if( (i & 1) == 1 ) {
                    s1.append("#");
                } else {
                    s1.append(".");
                }

                if( (i & 2) == 2 ) {
                    s2.append("#");
                } else {
                    s2.append(".");
                }
            }
            System.out.println(s1);
            System.out.println(s2);
            System.out.flush();

            switch (sc.next()) {
                case "T":
                    return 1;
                case "F":
                    return 0;
                default:
                    return -1;
            }
        });
    }

    interface Query {
        int send(ArrayDeque<Integer> values);
    }

    static void solve(Query q) {
        ArrayDeque<Integer> current = new ArrayDeque<>();
        boolean left = true;

        lo:
        while(true) {
            for (int j = 0; j < 4; j++) {
                ArrayDeque<Integer> next = new ArrayDeque<>(current);
                if( left ) {
                    next.addFirst(j);
                } else {
                    next.addLast(j);
                }
                int result = q.send(next);
                if( result == -1 ) return;

                if( result == 1 ) {
                    current = next;
                    continue lo;
                }
            }
            if( left ) {
                left = false;
            } else {
                throw new IllegalArgumentException("wtf");
            }
        }
    }

    @SuppressWarnings("unused")
    static class FastScanner {
        private BufferedReader reader;
        private StringTokenizer tokenizer;

        FastScanner(InputStream in) {
            reader = new BufferedReader(new InputStreamReader(in));
            tokenizer = null;
        }

        String next() {
            if (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        String nextLine() {
            if (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    return reader.readLine();
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken("\n");
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        int[] nextIntArray(int n) {
            int[] a = new int[n];
            for (int i = 0; i < n; i++)
                a[i] = nextInt();
            return a;
        }

        int[] nextIntArray(int n, int delta) {
            int[] a = new int[n];
            for (int i = 0; i < n; i++)
                a[i] = nextInt() + delta;
            return a;
        }

        long[] nextLongArray(int n) {
            long[] a = new long[n];
            for (int i = 0; i < n; i++)
                a[i] = nextLong();
            return a;
        }
    }

    static <A> void writeLines(A[] as, Function<A, String> f) {
        PrintWriter pw = new PrintWriter(System.out);
        for (A a : as) {
            pw.println(f.apply(a));
        }
        pw.flush();
    }

    static void writeLines(int[] as) {
        PrintWriter pw = new PrintWriter(System.out);
        for (int a : as) pw.println(a);
        pw.flush();
    }

    static void writeLines(long[] as) {
        PrintWriter pw = new PrintWriter(System.out);
        for (long a : as) pw.println(a);
        pw.flush();
    }

    static int max(int... as) {
        int max = Integer.MIN_VALUE;
        for (int a : as) max = Math.max(a, max);
        return max;
    }

    static int min(int... as) {
        int min = Integer.MAX_VALUE;
        for (int a : as) min = Math.min(a, min);
        return min;
    }

    static void debug(Object... args) {
        StringJoiner j = new StringJoiner(" ");
        for (Object arg : args) {
            if (arg instanceof int[]) j.add(Arrays.toString((int[]) arg));
            else if (arg instanceof long[]) j.add(Arrays.toString((long[]) arg));
            else if (arg instanceof double[]) j.add(Arrays.toString((double[]) arg));
            else if (arg instanceof Object[]) j.add(Arrays.toString((Object[]) arg));
            else j.add(arg.toString());
        }
        System.err.println(j.toString());
    }
}


Measured memory_bytes: 28836