import java.io.*; import java.util.*; public class Main { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(); int n = sc.nextInt(); StringBuilder sb = new StringBuilder(); while (n-- > 0) { if (compare(sc.next(), sc.next()) < 0) { sb.append("Y\n"); } else { sb.append("X\n"); } } System.out.print(sb); } static int compare(String x, String y) { String xx = x + y; String yy = y + y; if (xx.equals(yy)) { return x.length() - y.length(); } else { return xx.compareTo(yy); } } } class Scanner { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringTokenizer st = new StringTokenizer(""); public Scanner() throws Exception { } public int nextInt() throws Exception { return Integer.parseInt(next()); } public long nextLong() throws Exception { return Long.parseLong(next()); } public double nextDouble() throws Exception { return Double.parseDouble(next()); } public String next() throws Exception { while (!st.hasMoreTokens()) { st = new StringTokenizer(br.readLine()); } return st.nextToken(); } }