Print all words that start and end with the same letter.

Difficulty: Medium

Phase: 5 · Strings

XP Reward: 20 XP

Topics: Strings, Medium

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

Problem Description

Given a sentence, print all words that start and end with the same letter (case-insensitive) separated by space. 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: noon radar apple level deed

Output: noon radar level deed

Explanation: Sample execution for input noon radar apple level deed