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:
3, 10, ['s', '3299', 'K', 'D', '4621', '9075', 'K', '6987', 'S', '9829', 'm', 'I', '3797']

Ex Output:
9289S7896K57091264DK


Ex Input:
1, 7, ['j', 'P', '5633', 'g', 'z', '3163', '8849', '1267', '1157', '6987', '9743']

Ex Output:
94883613zg3365Pj


Ex Input:
13, 13, ['1575', 'D', '1335', '2335', 'D', '9893', 'U', 'j', '5145', '6041', '2655', 'r', '5243', '8745', '7439']

Ex Output:

3425