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#有些地方还有些迷糊，先MARK一下
def dps(n):
m1 = 'one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve,thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen'.split(',')
m2 = 'twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety'.split(',')
if(n<20):
return m1[n-1:n]
if(n<100):
return [m2[n//10-2]] + dps(n%10)
if(n<1000):
return [m1[n//100-1]]+['hundred']+['and']+dps(n%100)
else:
for w,p in enumerate(('thousand','million','billion'),1):
if(n<1000**(w+1)):
return dps(n//(1000**w))+[p]+dps(n%1000**w)
def question():
n = int(input())
return ' '.join(dps(n)) or zero
while(True):
try:
print(question())
except:
break
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