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: 21, 27, ['2789', '3875', '2351', 'Y', '1127', 'J', 'Z', '5187', 'c', '8115', '3459', 'Y', 'f', 'o', 'L', 'H', '2931', '879', 'L', 'e', '3745', '173', 'v', 'W', '9393', 'Y', '7651']

SOLUTION: 20962

PROBLEM: 1, 1, ['d', '6481']

SOLUTION: 0

PROBLEM: 13, 25, ['j', '7927', '9075', 'z', '3263', 'j', '3427', 'd', '107', '6529', 'f', '5473', 'V', '9365', '4007', '1161', 'F', 'k', '1279', 'X', 'c', 'L', '201', '535', 'T']

SOLUTION:
16548