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, 9, ['549', 'T', 'y', '2107', '7021', '7423', '1731', 'P', '8245']

2107702174231731P8245