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, 8, ['J', '4955', '3497', '8869', 'n', '2093', '6249', 'A', '8957']
[EX A]: A94263902

[EX Q]: 7, 10, ['417', '8131', '7239', '9699', 'z', 'H', 'P', '9349', '4835', '3217', '9899']
[EX A]: 712353849439P

[EX Q]: 3, 8, ['6945', '2403', '7633', '2933', '1015', 'G', '7261', '9101', '6435', 'M']
[EX A]:
10191627G510133923367