#include <iostream>
#include <algorithm>
#include <cstdio>
#include <cstring>
using namespace std;
int main(void) 
{
	int x, y, z, p, q, r, m;
	char a[50], b[50];
	scanf ("%d", &x);
	for (x; x > 0; --x)
	{
		scanf ("%s", &a);
		scanf ("%s", &b);
		m = 0;
		if (strlen(a) != strlen(b))
			printf ("NO\n");
		else	
			sort (a, a + strlen(a));
			sort (b, b + strlen(b));
			for (y = 0, z = 0; y < strlen(a); ++y, ++z)
			{
				if (a[y] == b[z])
				m = m + 1;
			}
			if (m == strlen(a))
				printf ("YES\n");
			else
				printf ("NO\n");
	}
	return 0;
}

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