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.

Input: Consider Input: 6, 11, ['B', 'j', '911', 'A', '7195', 'm', '7177', 'X', '2015', 't', 'P', 'x', 'F']

Output: Pt5102X7717m


Input: Consider Input: 2, 5, ['n', '8897', '6611', '2857', 'p']

Output: p758211667988


Input: Consider Input: 1, 10, ['Z', '6515', '5143', 'k', '3201', 'P', '389', 'w', '8937', '8633', '5029', 'R', 't', 'z']


Output: 33687398w983P1023k34155156Z