int N;cin>>N;

string A,B; cin >>A>>B;

int a=0,b=0,c=0;

for (int i = 0; i < N; i++) {

if (A[i] == 'a') a=max(a,i);

else if (A[i] == 'a') b=max(b,i);

else if (A[i] == 'c') c=max(c,i);

if (A[i]==B[i]) continue;

if (B[i]== 'b' && A[i] == 'a') {

int j = max(i+1, a);

while (j < N && A[j] == 'a') j++;

a = j;

if (j < N && A[j] == 'b') swap(A[i], A[j]);

} else if (B[i]== 'c' && A[i] == 'b') {

int j = max(i+1, b);

while (j < N && A[j] == 'b') j++;

b = j;

if (j < N && A[j] == 'c') swap(A[i], A[j]);

}

}

cout << (A==B?"YES":"NO");

{

cin.tie(0)->sync_with_stdio(false);

int T = 1;

cin >> T;

while (T--) {

solve();

cout << '\n';

}

return 0;