#include<stdio.h>
int main()
{
    int N,T,i,j;char a[100],b[100],c[100],cnt;
    scanf("%d",&T); 
    for(j = 0;j < T;j ++)
    {
        scanf("%d",&N);
        scanf("%s",a);
        scanf("%s",b);
        cnt = 0;
        for(i = 0;i < N;i ++)
        {
            if(a[i] == 'A' && b[i] == 'U' || a[i] == 'T' && b[i] == 'A' || a[i] == 'C' && b[i] == 'G' || a[i] == 'G' && b[i] == 'C')
            cnt ++;
        }
        if(cnt == N)
        c[j] = 1;
        else
        c[j] = 0;
    }
    for(j = 0;j < T;j ++)
    {
        if(c[j])
        printf("YES\n");
        else
        printf("NO\n");
    }
}