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]: 4, 13, ['6993', '5601', 'n', 'J', 'E', 'M', 'd', 'T', 'V', 'C', '4969', 'J', 'F']
[EX A]: FJ9694CVTdMEJ

[EX Q]: 2, 5, ['n', '8897', '6611', '2857', 'p']
[EX A]: p758211667988

[EX Q]: 6, 11, ['9919', '2025', '6619', '3967', '7049', 'V', '907', '8023', 'R', 'j', '4729', '2493', 'l']
[EX A]:
9274jR3208709V