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: 15, 20, ['8393', '1739', 'c', '9457', '6169', '3841', 'u', 'e', '8579', '5221', 't', 'H', '629', '4905', 'Y', 'u', '5795', '8157', '9843', '7863', 'G', '3413']

Yu5795815798437863