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:
1, 2, ['L', '7723']

Ex Output:
3277L


Ex Input:
15, 16, ['4531', 'a', 'I', 'W', '1071', '1301', 'v', 's', '3521', '7203', '1157', 'w', '7201', 'a', 'I', 'z', 'V', 'X', 'j']

Ex Output:
zI


Ex Input:
4, 23, ['1719', '3685', '3273', '9793', '3441', '3249', 'b', 'n', '4409', '9043', 'y', 'I', 'o', '3999', '3909', 'T', '2453', 'M', '1443', '5701', '1149', '7867', 'h', 'X', '7549', '1261', '8045']

Ex Output:

h7687941110753441M3542T90939993oIy34099044nb942314433979