instruction:
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 find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output 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. Perform the operations in order, i.e., do not concatenate the elements and then reverse the string.
question:
19, 20, ['x', '6239', 'D', 'l', 'Y', 'd', '6405', 'l', '2629', '4743', '8271', '3749', 'W', 'r', '9153', '2941', '6477', '2623', 'F', 'J']
answer:
JF


question:
1, 6, ['4937', 'x', '6497', 'l', 'n', 'V']
answer:
Vnl6497x4937


question:
10, 27, ['73', '2897', 'h', '6583', 'D', 'S', 'j', '5679', 'B', 'y', '123', 'w', '1827', 'e', 'Z', '761', '5137', '5167', '8123', 'P', 'm', '2927', 'H', '5755', 'b', '3631', 'l']
answer:

l3631b5755H2927mP812351675137761Ze1827w123y