#586. Words with exactly 6 letters
You are given some words. Print the words that have exactly 6 letters, in their order, separated by spaces. If there are none, print `None`.
### Input
One line.
### Output
One line.
Examples
Input
summer loop music banana print python number
Output
summer banana python number
Input
python stats winter mountain castle computer
Output
python winter castle
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.