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]: 3, 6, ['A', '6949', '2045', '119', '1373', '9613']
[EX A]: 316937319115402

[EX Q]: 5, 6, ['7319', 'U', 'Z', '1163', '8123', '4861', '117', '3893', '2489', 'S', '1511']
[EX A]: 16843218

[EX Q]: 8, 17, ['G', 'W', 'X', 'd', '3153', '2253', '8069', 'u', '3099', '5279', '2253', '9221', '4821', '2179', '4865', 'B', '3519', '9701', '3775', 'c', '4409', '3295', 'z', '8373', '6491']
[EX A]:
9153B5684971212841229352297259903u