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.
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Question: 8, 21, ['2381', '5057', 'o', 'M', '7495', '3787', '3877', '5055', '6055', '4145', 'v', 'O', 'K', '361', 'X', 'H', '357', 'H', '7553', 'S', 'R', 'H', '5973']

Answer: RS3557H753HX163KOv541455065505


Question: 14, 17, ['7891', 'n', '3475', 'c', '3281', 'Y', 'R', '5745', '4195', 'c', 'r', 'D', '7707', 'V', '7313', '8857', '1849', '5591', '553', '8389', '3833', 'm', 'v', '3663', 'k', 'U', 'o', 'p']

Answer: 948175883137V


Question: 15, 16, ['7961', 'H', 'o', 'c', '8481', 'T', '9375', '8585', '3373', '8367', '911', 'w', '7683', '1499', '1425', '7177', 'I', 'i']

Answer:
77175241