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: 3, 18, ['W', 'U', 'Z', '7389', '8715', '2391', '4159', 'Z', '3197', '737', 'f', 'V', '2285', 'u', 'v', '6499', 'T', 'G', 'v', 'K']

Z7389871523914159Z3197737fV2285uv6499TG