Swap Case

Have the function SwapCase(str) take the str parameter and swap the case of each character. For example: if str is "Hello World" the output should be hELLO wORLD. Let numbers and symbols stay the way they are.

Examples

Input: "Hello-LOL"
Output: hELLO-lol

Input: "Sup DUDE!!?"
Output: sUP dude!!?