TASK DEFINITION: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to return the sum of all the numerical elements in the list A between the positions i and j (including positions i and j). Return 0 if no numerical element is present in the list between the given ranges. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
PROBLEM: 3, 21, ['X', 'Z', '749', '5557', '9991', 'T', '3461', '335', 'I', 'J', '7113', 'b', '2683', '653', '3951', '4193', 'J', '7179', 'G', 'Y', '6151', '2873', 'X', '5619', '5151', '7689', '5605', 'o']

SOLUTION: 52016

PROBLEM: 16, 20, ['8615', '8269', 'k', 'R', 'l', '9823', '6879', '7777', 'w', '8443', 'W', '6951', 'Q', '8251', 'M', 'g', 'F', 'w', 'C', '7267', 's', '973', '4703', '8921']

SOLUTION: 7267

PROBLEM: 8, 14, ['A', 'g', '1679', 'l', '6955', 'a', 'p', 'L', 'P', 'e', 'y', 'X', 'T', 'q', '8235', 't', '283', '8341']

SOLUTION:
0