q=int(raw_input())
for _ in range(q):
k=int(raw_input())
n=int(raw_input())
p=map(int,raw_input().split())
print k
print p
cT1pbnQocmF3X2lucHV0KCkpCmZvciBfIGluIHJhbmdlKHEpOgoJaz1pbnQocmF3X2lucHV0KCkpCgluPWludChyYXdfaW5wdXQoKSkKCXA9bWFwKGludCxyYXdfaW5wdXQoKS5zcGxpdCgpKQoJcHJpbnQgawoJcHJpbnQgcAoJ