package Strings;
import java.util.Scanner;
public class Anagram {
public static void main(String args[]){
Scanner sc = new Scanner(System.in);
//char word[] = {'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};
int c;
int n = sc.nextInt();
while(n--!=0){
c=0;
int count1[] = new int[26];
int count2[] = new int[26];
String s = sc.next();
int l = s.length();
if(l%2!=0)
System.out.println(-1);
else{
String s1 = s.substring(0,l/2);
String s2 = s.substring(l/2,l);
for(int j=0;j<26;j++){
for(int i=0;i