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, 19, ['2647', '3577', '7489', '5179', '6571', 't', '8645', 'F', 'K', '1771', '8309', 'x', 's', 'x', '517', '5451', 'R', 'X', '4109', '6743', 'r', 'o', '5087', '4149', 'r', '2501', 'J']

51796571t8645FK17718309xsx5175451RX4109