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]: 6, 11, ['B', 'j', '911', 'A', '7195', 'm', '7177', 'X', '2015', 't', 'P', 'x', 'F']
[EX A]: Pt5102X7717m

[EX Q]: 2, 3, ['T', '2161', '227']
[EX A]: 7221612

[EX Q]: 7, 11, ['167', 'J', '3801', 'J', '3205', 'w', 'p', '183', '497', '8323', 'L', '8477', '5943', '3505', 'o', '4363', '351', '9209', 'S', '7743']
[EX A]:
L3238794381p