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.

2, 4, ['o', '5393', 'p', 'h', '5617', 'F', 'I', 'a']
hp3935

22, 23, ['9853', '3839', '2279', 'o', 'Y', '6513', '4505', '1861', 'm', '8009', 'i', '8855', '6777', '3055', '4055', '3903', '5639', 'y', '579', '7271', '8021', 'R', '4547', '1439', '29', '1611', 't', '6279']
7454R

7, 7, ['9035', 'U', 'T', '6253', '8683', 'O', '4863', 'U', 'o', 'D', 'E', 'o', '477', 'e', 'E', '7711', 'D']

3684