- start by calculating the difference between (a and b)
- then create an array that compares the two strings
- use string interpolation which will create the string
- add a return value
- Start by creating an empty object that will keep track of the counts for each character
- use forloop to iterate through each character in the input string
- then initialize the count to 1 if the character has not been used
- else if the character has been used it will return an array of counts