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]: 1, 13, ['497', 'v', '7469', 'c', '8913', '533', 'P', '3051', '2237', 'R', '9609', 'J', 'R', 'x', '5787', '2203', '5943', '6847', '8989', 'A', '5227', 'O', 'M', 'n', '4993']
[EX A]: RJ9069R73221503P3353198c9647v794

[EX Q]: 8, 8, ['911', 'n', '261', 'J', '1181', '6903', '2085', '5225', 'N', '4041', '4891', '6241']
[EX A]: 5225

[EX Q]: 3, 13, ['f', 'j', '6333', 'd', '2563', '177', 'K', 'Q', '4943', 'x', '2043', '4039', '2811', '2365', '9697', '7053', 'S', 'k', '1773', '9929', '8153', 'K', 'i']
[EX A]:
118293043402x3494QK7713652d3336