#571. Every 4th character
You are given a text. Starting from the first character, join every 4th character (indexes 0, 4, 2·4, ...) and print the result.
### Input
One line of text.
### Output
One line.
Examples
Input
stats string river
Output
ssr e
Input
rocket computer winter winter
Output
reotweir
💡 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.