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, 4, ['s', '4715', '8867', '5091', '435', 'z', '1765', 'H', '5107', 'F', 'F', 'i', '8923', '3693', 'F', '1211', '3111', '1669', 'm', 'c']
[EX A]: 190576885174

[EX Q]: 10, 27, ['z', '7203', 'd', '1795', '45', '1803', 'L', '2839', '6285', 'W', '1969', 'x', '6565', '8849', '6091', 'M', '7925', '37', 'h', '381', '59', 'O', '3283', 'u', '9831', 'Y', '5701', '7249', 'w']
[EX A]: 1075Y1389u3823O95183h735297M190694885656x9691W

[EX Q]: 19, 20, ['1281', '3165', '5073', 'F', '9531', '3423', 'A', '4215', '4685', 'n', '1257', '4557', '9053', 'I', '1549', 'a', '2421', 'l', 'r', '5141', 'o', '4799', 'i', '6317', '1873', '93', 'o']
[EX A]:
1415r