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.

[EX Q]: 5, 8, ['1861', '2831', '6423', '9641', 'o', 'J', '8215', '4149', '5345', '4371', '7747']
[EX A]: 94145128Jo

[EX Q]: 8, 12, ['K', 'x', 'a', 'A', '6203', '117', '1007', '6063', '569', '9809', '9097', 'w', '3939', 'l', 'V']
[EX A]: w790990899653606

[EX Q]: 8, 16, ['M', '7569', '8333', '9455', '6061', '8227', 'd', '5305', 'h', 'a', 'f', 'E', 'A', '1059', '9909', 'J', 'G', '5233', '3449', '223', '5993', '1819', '5099', '8227', 'n', 'A', 'I', 'M', 'o', 'R']
[EX A]:
J90999501AEfah5035