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, 21, ['X', '7107', 'N', '1405', '5459', 'Y', '9863', 'W', 'c', '5475', 'B', 'V', '249', 'R', '7097', 'b', 'N', 'k', '2539', '3855', 'Y', '5403', '6497']

14055459Y9863Wc5475BV249R7097bNk25393855Y