#include<stdio.h>
#include<string.h>
int main()
{
    int T,n,i;
    char a[101],b[101];
    scanf("%d",&T);
    while(T--)
    {
        scanf("%d",&n);
        getchar();
        gets(a);
        gets(b);
        int x=0;
        for(i=0;i<n;i++)
        {
            if(a[i]=='A')
            {
                if(b[i]=='U'||b[i]=='T')
                    x++;
            }
            else if(a[i]=='C'&&b[i]=='G')
                x++;
            else if(a[i]=='G'&&b[i]=='C')
                x++;
            else if(a[i]=='T'&&b[i]=='A')
                x++;
            else if(a[i]=='U'&&b[i]=='A')
                x++;
        }
        if(x==n)
            printf("YES\n");
        else
            printf("NO\n");
    }
    return 0;
}