#540. Alternating case
You are given a word. Make letters at even indexes (0, 2, ...) uppercase and letters at odd indexes lowercase.
### Input
One word.
### Output
One line.
Examples
Input
list
Output
LiSt
Input
window
Output
WiNdOw
💡 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.