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.

3, 11, ['B', 'V', 'S', '7211', 'U', '7773', '4803', 'z', '9371', 'l', 'S', '1559', 'l', '9203', '9919', 'M']
Sl1739z30843777U1127S

1, 4, ['I', '5919', 'J', '6387']
7836J9195I

14, 16, ['313', 'W', '1991', '4235', 'T', 't', '3567', 'a', 'M', 'I', '1165', '6623', '843', '2127', 'S', 'R']

RS7212