grunds = [0,1,2,2,3,3,0,0,0,0,0,0]
def grundy(n):
    return grunds[n] if n < 12 else grundy(n/12)

for cas in xrange(input()):
    n = input()
    a = map(int, raw_input().strip().split())
    x = 0
    for v in a: x ^= grundy(v)
    print 'Henry' if x else 'Derek'