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:
3, 5, ['q', 'G', '9871', '3427', 'Q', '1993', 'H']
answer:
Q34279871


question:
4, 6, ['5237', 'U', '7073', 'K', 'R', 'g', 'D', '17', 'I', '3039']
answer:
gRK


question:
3, 4, ['E', 'K', '5909', 'c', 'j', 'f']
answer:

c5909