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: 4, 12, ['977', '7147', '6035', 'T', 'g', 'h', 'n', 'D', '5557', 'T', '4901', 'T', 'l', 'n', 'U', 'j', 'r', '9285', '7517', '1621']

TghnD5557T4901T