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: 10, 13, ['z', 'h', '141', '7351', '3683', '2199', '1981', '107', 'Y', 'E', 'G', 'P', '9677', 'O', 'e', '1661', 'f', '1367', 'b', '8531']

SOLUTION: 9677

PROBLEM: 7, 12, ['K', '5995', '5183', '67', '563', '9143', 'M', 'H', '2923', '1825', 'y', '373', 'm', 'w', 'x']

SOLUTION: 5121

PROBLEM: 3, 7, ['6439', 'J', 'F', 'X', '9337', '4429', 'C', '147', '9099', '5189']

SOLUTION:
13766