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: 1, 2, ['1907', '1489', 'm', '4571', 'a']

SOLUTION: 3396

PROBLEM: 11, 13, ['L', 'v', 'o', '8089', 'u', '7105', '4451', '9785', 'e', 'p', 'p', '7077', '2815', 'v', 'p', '3593', 't', '6771', 'd', '2651']

SOLUTION: 9892

PROBLEM: 1, 11, ['P', 'm', 'V', 'J', 's', 'x', 'V', 'l', 'A', 'a', '3749', 'U', 's', 'a', '3283', '4149']

SOLUTION:
3749