You have an array of item codes with the following format: "[letters][digits]"
Create a function that splits these strings into their alphabetic and numeric parts.
splitCode("TEWA8392") ➞ ["TEWA", "8392"]
splitCode("MMU778") ➞ ["MMU", "778"]
splitCode("SRPE5532") ➞ ["SRPE", "5532"]N/A