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.
One example: 1, 3, ['238', 'h', '92', 'U', '2799']
Solution is here: 29h832
Explanation: Here, concatenating all the elements between the 1st element and 3rd element and then reversing the string gives '29h832'.

Now, solve this: 20, 23, ['9105', '4539', 'n', '4421', '3455', 'G', 'c', 'j', '1041', 'A', '6333', 'O', '1047', 'm', '2811', '1671', 'D', '6523', '6467', 'x', 'f', 'u', '7337', 'g', 'P', 'A', 'T', 'G', '8847', '4115']
Solution:
7337ufx