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.

[Q]: 3, 10, ['g', '5155', 'p', '6627', 'W', 'q', '2851', 'm', 's', '7781', 'u', '9739']
[A]: 1877sm1582qW7266p


[Q]: 3, 4, ['2419', '643', '8177', '7291', '561', '6529', '4101', 'u', '6445']
[A]: 19277718


[Q]: 23, 29, ['R', '8309', '277', 'J', '2839', 's', '3875', 'h', 'g', 'd', '7563', 'j', 't', 'h', 'f', '8193', '8391', '4893', '9907', 'q', '8793', 'y', '6103', '1705', 'S', 'E', 's', 'z', '5157']
[A]:
7515zsES50713016