T=int(input()) for i in range(T): n=int(input()) a=[] s=" "*n for j in range(int((n+1)/2)): b=list(s) b[j],b[n-1-j]="x","x" s="".join(b) a.append(s) print(s) s=" "*n for r in range(int((n-1)/2),0,-1): print(a[r-1]) print("\n")