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.

Q: 4, 7, ['3421', '6129', '593', '203', '2731', '1393', '9739', '1087', '3453', '1389', 'W', 'D', 'b', '9261']

A: 937939311372302
****
Q: 5, 7, ['Y', '5101', 'B', '5129', 'a', 'y', 'v', '4577', '5455', '6685', '6435']

A: vya
****
Q: 1, 4, ['6007', 'D', '5419', '1237']

A:
73219145D7006
****