package algospot;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;

public class MainDragon {
    private static int n;
    private static StringBuffer sb;
    private static int skip;
    private static int l;
    private static long[] caches;

    public static void main(String[] args) throws NumberFormatException, IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        precalc();
        int cases = Integer.parseInt(br.readLine());
        for (int i = 0; i < cases; i++) {
            String[] split = br.readLine().split(" ");
            n = Integer.parseInt(split[0]);
            skip = Integer.parseInt(split[1])-1;
            l = Integer.parseInt(split[2]);
            sb = new StringBuffer();
            curve("FX" , n);
            System.out.println(sb);
        }
    }

    private static void precalc() {
        caches = new long[51];
        caches[0] = 1;
        for (int i = 1; i <= 50; i++) {
            caches[i] = (long) (caches[i-1] + Math.pow(2, i+1) - Math.pow(2, i-1));
        }
    }

    private static void curve(String seed, int generation) {
        if(generation == 0) {
            if(l > 0) {
                printSeed(seed);
            }
            return;
        }
        for (int i = 0; i < seed.length(); i++) {
            if(seed.charAt(i) == 'X') {
                long length = caches[generation];
                if (length <= skip) {
                    skip = (int) (skip -length);
                } else {
                    curve("X+YF", generation - 1);
                }
            } else if(seed.charAt(i) == 'Y') {
                long length = caches[generation];
                if (length <= skip) {
                    skip = (int) (skip -length);
                } else {
                    curve("FX-Y", generation - 1);
                }
            } else {
                if(l >0) {
                    printSeed(String.valueOf(seed.charAt(i)));
                } else {
                    return;
                }
            }
        }
    }

    private static void printSeed(String seed) {
        if(skip>0) {
            if(seed.length() <= skip) {
                skip = skip - seed.length();
            } else {
                skip = 0;
                printSeed(seed.substring(skip));
            }
        } else {
            for (int i = 0; i < seed.length() && l != 0; i++) {
                sb.append(seed.charAt(i));
                l--;
            }
        }
    }
}