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, 6, ['A', '6949', '2045', '119', '1373', '9613']
[A]: 316937319115402


[Q]: 3, 7, ['u', '1307', 'F', '8027', 'r', '4559', 'F', 'm', '9805', '5063']
[A]: F9554r7208F


[Q]: 15, 19, ['7941', 'g', '7645', 'v', 'o', '1367', 'D', '6107', '7381', '6497', 'e', '227', 'V', 'X', '6361', '6021', 'x', 'C', 'P']
[A]:
PCx12061636