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, 6, ['w', 'V', '7413', '5027', 's', '7037', 'S', '763', 'D', 'U', 'x', 'l', '9331', 'S', 'k', '8369', 'D', 'A', 'e', 'A', 'r', '5113', '1367', '4197', 'm']

SOLUTION: 19477

PROBLEM: 20, 26, ['8183', 'I', 'o', 'B', '7567', '4953', '8133', '2883', 'g', 'D', '865', 'a', 'y', 'Z', 'F', '3211', 'e', 'X', '5135', '7257', 'G', '1577', '7977', 'X', 'z', 'e']

SOLUTION: 16811

PROBLEM: 2, 5, ['T', '2695', '2573', '6391', 'v', '1689', '6333']

SOLUTION:
11659