1. Print all permuation of string it can contain digit, small charater and capital charater. Return permuation of string in sorted order (digit-> small char -> captial char)
2. Given input U 3 U -3 O O X output: -3 3 
U push in stack
O pop in stack
X end of string

Solved 2nd question completly. Will I be qualified for next round?

Print all permuation of string it can contain digit, small charater and capital charater. Return permuation of string in sorted order (digit-> small char -> captial char)
Given input U 3 U -3 O O X output: -3 3
U push in stack
O pop in stack
X end o

WEX interview coding questions