string1 = “Joe”
string2 = “John”
Expected output is 3
Explanation of the output
From string1 = 1 letter, “e” is uncommon and from string2 = 2 letters “ h and n” are uncommon characters with the other string.
The solution looks obvious, but I didn’t find any straight forward method on internet to do so. I found some solution on geeksforgeeks website, but it was for…