T = int(input())
for tc in range(1, T+1):
_ = int(input())
numbers = list(map(int, input().split()))
check = [0] * 101
max_idx = 0
for i in numbers:
check[i] += 1
max_cnt = max(check)
for j in range(len(check)):
if check[j] == max_cnt:
if j > max_idx:
max_idx = j
print('#{} {}'.format(tc, max_idx))