题解 | #学英语#

#英文单词上网查的，部分忘了
def fun(x):
    if x<=9:
        return gw[x]
    if x<=19:
        return g1[x-10]
    if x<=99:
        if x%10>0:
            return sw[x//10-2]+" "+fun(x%10)
        else:
            return sw[x//10-2]
    if x<=999:
        if x%100==0:
            return gw[x//100]+" hundred"
        else:
            return gw[x//100]+" hundred and "+fun(x%100)

gw=["zero","one","two","three","four","five","six","seven","eight","nine"]
g1=["ten","eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen","eighteen","nineteen"]
sw=["twenty","thirty","forty","fifty","sixty","seventy","eighty","ninety"]
jemy=["billion","million","thousand"]
n=int(input())
l=[]
while n:
    l.insert(0,n%1000)
    n=n//1000
s=str(fun(l[-1]))
for i in range(-2,-1*len(l)-1,-1):
    s=fun(l[i])+" "+jemy[i+1]+" "+s
print(s)