#include <iostream>
#include <string>
using namespace std;
void spell(int n, string* const &a)
{
if (n == 0)
return;
spell(n / 10, a);
cout << a[n % 10];
}
int main()
{
int n;
string a[10]{"zero ", "one ", "two ", "three ", "four ", "five ", "six ", "seven ", "eight ", "nine "};
do
{
if ((!(cin >> n)) || (n < 0))
break;
spell(n, a);
}
while (true);
return 0;
}
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