Lexical Sorting Reloaded - HackerEarth Solution

t = int(input())

def lex(s):
    return sorted(sorted(s), key= str.lower)


for i in range(t):
    x = int(input())
    d = []
    for j in range(x):
        s = input()
        d.append(s)
    
    a = lex(d)
    for j in range(x):
        print(a[j])