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

[EX Q]: 1, 7, ['j', 'P', '5633', 'g', 'z', '3163', '8849', '1267', '1157', '6987', '9743']
[EX A]: 94883613zg3365Pj

[EX Q]: 12, 13, ['Q', 'B', '8777', '2263', 'J', 'A', '8387', '2117', '4535', 'I', 'b', '835', '5411', 'M', 'j', 'v', '1805']
[EX A]:
1145538