package baekjoon;
import java.util.*;
import java.io.*;
public class Strfry_11328 {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int N = Integer.parseInt(br.readLine());
for(int i=0; i<N; i++){
StringTokenizer st = new StringTokenizer(br.readLine(), " ");
String[] arrA = st.nextToken().split("");
String[] arrB = st.nextToken().split("");
Arrays.sort(arrA);
Arrays.sort(arrB);
StringBuilder sb1 = new StringBuilder();
StringBuilder sb2 = new StringBuilder();
for(int j=0; j<arrA.length; j++)
sb1.append(arrA[j]);
for(int j=0; j<arrB.length; j++)
sb2.append(arrB[j]);
if(sb1.toString().equals(sb2.toString()))
System.out.println("Possible");
else System.out.println("Impossible");
}
br.close();
}
}
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