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: 4, 13, ['5653', '9869', '5325', '7307', '5513', '2167', '2393', 'p', 'F', '2011', '5431', '2695', 'v', 'p', '3743', 'j', 'y', '5903', '5135', '467', '8443', 'C', 'i', 'w', 'y']

SOLUTION: 27517

PROBLEM: 7, 26, ['I', 'K', '7025', 'g', '271', '9365', 'i', '449', 'q', '8499', '4887', 'M', '885', '3831', '4789', 'I', '8181', 'b', 'I', '5639', 'p', '649', '535', 'k', '6621', 'j', '9539']

SOLUTION: 44965

PROBLEM: 2, 9, ['9067', '35', 'I', 'z', '5599', 'R', '7909', '2927', '2707', 'z', 'l', 'V', 'o', '8065', '9879', 'w', 'z', 'H', '3347', '2073', '2591', '5429', '5731', '9377', 'p']

SOLUTION:
19177