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:
6, 11, ['B', 'j', '911', 'A', '7195', 'm', '7177', 'X', '2015', 't', 'P', 'x', 'F']
answer:
Pt5102X7717m


question:
5, 8, ['g', 'a', '2875', '9581', '3263', '3103', 'J', 'b', 'h']
answer:
bJ30133623


question:
2, 2, ['X', 'G', '8869', 'T', '8857', 'I', '7789', 'W', 'v', 'v', 't', '5747', 'u', '1789', '8529', '4019', 'm', 'y', '1395', '3025', 'G', '323', 'w', '7119']
answer:

G