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 Input:
4, 7, ['6083', 'j', 'x', 'K', 'p', 'M', 'u', '4969', '2423', 'w', 'v', 'S', 'Y', 'v', '5165', 'Y', '3127', '79', '9755', 'Y', 'B', '7395', '6093', 'k', '2043', '6807']

Ex Output:
uMpK


Ex Input:
4, 6, ['w', '8785', '2921', 'J', 'P', 'g', '9273', '5439', 'O', 'F', 'u', '967', '9007']

Ex Output:
gPJ


Ex Input:
23, 26, ['3819', 'z', 'I', 'p', '6101', '8451', '9801', 'h', 'm', '9113', 'P', '877', 'i', '3743', '2389', 'A', '8009', 'z', '9883', 'q', 'S', 'G', '9043', 'r', '8975', '8131', '8845', 'c', '2605', '4743']

Ex Output:

13185798r3409