Print digits of a number in words recursively (e.g., 123 → "one two three").

Difficulty: Hard

Phase: 3 · Recursion

XP Reward: 30 XP

Topics: Recursion, Hard

Supported Languages: Python, JavaScript, C, C++, Java

Problem Description

Given positive integer N, print its digits in words separated by space recursively (e.g., 123 -> 'one two three'). Input Format: Read input from standard input (stdin). Output Format: Print the result to standard output (stdout).

Constraints

-10^9 <= N <= 10^9

Examples

Example 1

Input: 123

Output: one two three

Explanation: Sample execution for input 123