#include <iostream>
#include <vector>
#include <string>
int main() {
int a, b;
std::vector<std::string> numbers = {"zero", "one", "two", "three", "four",
"five", "six", "seven", "eight", "nine"};
std::cin >> a >> b;
for (int i = a; i <= b; i++) {
if (i > 9 && i % 2 == 0) {
std::cout << "even";
} else if (i > 9 && i % 2 != 0) {
std::cout << "odd";
} else {
std::cout << numbers[i];
}
}
return 0;
}
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