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: 14, 14, ['a', 'i', '5431', 'U', '9109', 'm', 'H', '7643', '127', 'a', 'S', '4285', '5625', '5479', '6409', 'U', 'n', 'R']

SOLUTION: 5479

PROBLEM: 14, 18, ['y', '4021', '9011', '3447', '6467', '5599', 'T', 'g', '1441', 'e', '2857', '7251', 'D', '619', '6413', '3145', '9355', 'O', 'Z', '6521', '5005', 'Q']

SOLUTION: 19532

PROBLEM: 1, 2, ['r', 'P']

SOLUTION:
0