L = ['Bart', 'Lisa', 'Adam']
#for循环练习
for name in L:
    print('Hello,%s!'% name)
n = 2
#while循环练习
while n >= 0:
    print ('Hello,%s' % L[n],'!')
    n = n - 1
w = 2
#死循环练习
while w > 0:
    print ('Hello,%s' % L[w],'!')
    n = n + 1