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.

Ex Input:
18, 22, ['R', '7403', 'b', 'R', 'y', '5343', '2589', '917', 'f', '5383', 'Q', 'f', '5491', 'j', 'v', '5073', '923', '5491', '6737', 't', 'S', 's']

Ex Output:
54916737tSs


Ex Input:
12, 12, ['O', 'y', 'c', 'E', 'g', 'o', '6539', 'r', '8917', '2839', '109', '6143', '3091', 'e', 'S', 'L', 'C', '4359']

Ex Output:
6143


Ex Input:
2, 18, ['3837', 'm', '4037', '7651', '8475', 'W', '5403', 'A', 'D', '7073', 'e', '9331', 'H', '1263', '2843', '777', 's', 'p', 'N', '7743', 'Q', 'Q', 'z', '5971', 's']

Ex Output:

m403776518475W5403AD7073e9331H12632843777sp