TASK DEFINITION: In this task, you are given a string of characters. You need to remove duplicate characters from the string if any, and return the resulting string.
PROBLEM: BmZfcKxvgfSmDoWSwSIxT

SOLUTION: BmZfcKxvgSDoWwIT

PROBLEM: VuQnzzRbtRnCSlENecvXCNiPGSAh

SOLUTION: VuQnzRbtCSlENecvXiPGAh

PROBLEM: MjGSdmgICPfwZJpwblfTUaGUlJna

SOLUTION:
MjGSdmgICPfwZJpblTUan