#include <stdio.h>
#include <string.h>
int main()
{
    int n;
    scanf("%d", &n);
    while (n--)
    {
        char a[1000], b[1000];
        int a1[26] = {0}, b1[26] = {0};
        scanf("%s %s", a, b);
        int lena = strlen(a), lenb = strlen(b), flag = 1;
        if (lena != lenb)
            flag = 0;
        for (int i = 0; i < lena && flag; i++)
            a1[a[i] - 'a']++;
        for (int i = 0; i < lenb && flag; i++)
            b1[b[i] - 'a']++;
        for (int i = 0; i < 26; i++)
        {
            if (a1[i] != b1[i])
            {
                flag = 0;
                break;
            }
        }
        if (flag)
            printf("Yes\n");
        else
            printf("No\n");
    }
}