#include <stdio.h>
#include <string.h>

char DNA[105];
char RNA[105];

int main()
{
    int t, n;
    int i, j;
    int flag;
    
    scanf("%d", &t);
    for (i = 0; i < t; i++) {
        flag = 1;
        memset(DNA, 0, sizeof(char));
        memset(RNA, 0, sizeof(char));
        
        scanf("%d", &n);
        
        scanf("%s", DNA);
        scanf("%s", RNA);

        
        for (j = 0; j < n; j++) {
            if (DNA[j] == 'A') {
                if (RNA[j] != 'U') {
                    flag = 0;
                    break;
                }
            }
            else if (DNA[j] == 'T') {
                if (RNA[j] != 'A') {
                    flag = 0;
                    break;
                }
            }
            else if (DNA[j] == 'C') {
                if (RNA[j] != 'G') {
                    flag = 0;
                    break;
                }
            }
            else if (DNA[j] == 'G') {
                if (RNA[j] != 'C') {
                    flag = 0;
                    break;
                }
            }
            
        }
        if (flag == 0) {
            printf("NO\n");
        }
        else
            printf("YES\n");

    }
    return 0;
}