#include<iostream>
#include<cstring>
#include<cstdlib>
using namespace std;
int cmp(const void* a, const void* b)
{
	return (*(char*)a - *(char*)b);
}
int main()
{
	char s1[105], s2[105];
	int n;
	cin >> n;
	while (n--) {
		memset(s1, 0, sizeof(s1));
		memset(s2, 0, sizeof(s2));
		cin >> s1 >> s2;
		int len1 = 0, len2 = 0;
		while (s1[len1++]);
		while (s2[len2++]);
		if (len1 != len2) {
			cout << "No" << endl;
			continue;
		}
		qsort(s1, len1, sizeof(s1[0]), cmp);
		qsort(s2, len2, sizeof(s2[0]), cmp);
		bool flag = true;
		for (int i = 0 ; i < len1; i++) {
			if (s1[i] != s2[i]) {
				flag = false;
				break;
			}
		}
		if (flag)
			cout << "Yes" << endl;
		else
			cout << "No" << endl;
	}
	return 0;
}