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]: 2, 6, ['1467', 'm', '9771', '6533', 'm', 'x', 'c', 'd', '3139']
[EX A]: xm33561779m

[EX Q]: 3, 8, ['6673', '3503', 'j', 't', 'y', 'q', 'S', '2339', 'B', 'C', 'b', 'K', '3323']
[EX A]: 9332Sqytj

[EX Q]: 13, 22, ['705', '5315', '5881', 'I', 'I', '9155', 'h', '7565', '2063', 's', '6463', 'J', '5097', '9375', 'u', '6301', '9253', 'P', 'x', '9263', '7883', '1119', 'Q', 'w', '5585', '4319', '4361', '9671']
[EX A]:
911138873629xP35291036u57397905