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.

[Q]: 5, 6, ['u', 'O', 'l', '9119', 'P', '6983', 'H', '6701']
[A]: 3896P


[Q]: 2, 5, ['f', 'd', '2691', 't', 'u']
[A]: ut1962d


[Q]: 10, 21, ['T', 'O', '8037', 'C', 'w', 'l', '653', 'g', 'd', '9119', '4969', 'N', '5679', '587', 'T', 'U', '403', '3703', 'e', 'g', '6579', 'A']
[A]:
9756ge3073304UT7859765N96949119