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:
18, 22, ['2445', 'L', 'x', 'i', '9929', '3105', 'v', '445', 'O', '353', 'j', '9877', 'D', 'U', '885', '9485', 'V', '8219', '2963', '685', '1659', 'U']
answer:
U165968529638219


question:
11, 12, ['8873', 'N', '5397', 'v', 'B', '5841', '6213', '8827', '9869', '9449', 'b', 'c', '5441', 'T', 'V']
answer:
cb


question:
2, 22, ['Z', '381', 'D', '9501', 'n', 'Y', '6343', 'j', '5621', 'l', '4665', 'n', 'j', 'I', '2917', '4051', 'R', 'B', '17', 'I', '4159', '2671', 'E', 'i', '9999']
answer:

26714159I17BR40512917Ijn4665l5621j6343Yn9501D381