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 concatenate all elements of A from the ith element to the jth element, and print the resultant string. 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.
Input: 8, 12, ['2119', '9497', '99', '901', '6035', '1459', 'T', 'a', '7239', '6035', '2881', 'u', 'J']

a723960352881u