Masking credit card number
Given a number and an integer (n), return a new string as shown in the examples.
Sample Code:
def coverUp(i,ii):
# Enter your logic here...
Examples:
Input: 123456,3
Output: '***456'
Explanation: The first 3 numbers have been replaced by asterisk symbols.
Input: 12345678,4
Output: '****5678'
Explanation: The first 4 numbers have been replaced by asterisk symbols.
