instruction:
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.
question:
1, 4, ['t', '6037', 'I', '2769', 'C']
answer:
9672I7306t


question:
14, 19, ['2487', 'z', '4131', 'I', 'k', 'o', 'T', '5069', '2815', 'b', '1097', 'E', '3231', 'k', '7187', '717', '3039', 'm', 'X', 'M', '9547', '2727', 'L', '8193', '3519', '3619']
answer:
Xm93037177817k


question:
1, 10, ['9943', 'T', '6317', 'd', '2091', '7229', '9901', '5163', 'w', 'P', 'B', '103', 'P', 'r', '2699', '8697', '9423', 'h', 'X', '361', '8641', '5601', 'e']
answer:

Pw3615109992271902d7136T3499