instruction:
In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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'. Perform the operations in order, i.e., do not reverse first and then concatenate.
question:
6, 10, ['P', '6217', 'k', '761', 'L', 'r', '1897', '1503', '7353', '1055', '6661', 'p', 'p', '4313', 'i', 'P', '5081', '3723', 'x', '8455', 'D', 'l', '1379']
answer:
5501353730517981r


question:
1, 5, ['E', 'h', 'N', '9931', 'F', '9367', 'N', 'K', 'Y', '1449', '8503', '9277', 'k', '9627', 'Q', 'v']
answer:
F1399NhE


question:
8, 21, ['Y', '5419', 'P', '1489', '9663', 'T', '3377', '7587', '3025', 'K', 'S', 'Y', '1201', '631', 'G', '3371', 'F', '1447', 'T', 'd', 'C', 'z', '4053', '3313', '4475', '6161']
answer:

CdT7441F1733G1361021YSK52037857