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, 18, ['8671', 'd', '5109', '1915', 'h', '2777', '3087', '9861', '8597', 'P', '4505', 'j', 'M', 'O', 's', 'Q', '2703', 'X', 'l', 'g', '1801']
[EX A]: X3072QsOMj5054P7958168978037772h51919015d

[EX Q]: 4, 5, ['3001', '661', 'S', 'N', '7919']
[EX A]: 9197N

[EX Q]: 11, 11, ['327', '333', 'Y', '3843', '5665', '7709', '2363', 't', '2997', '605', 'm', 'e', 'B', '6275', 'C', '8427', '4653', 'Y']
[EX A]:
m