TASK DEFINITION: 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.
PROBLEM: 3, 8, ['s', '8395', '7689', 'x', 'P', '5953', 'X', 'D']

SOLUTION: DX3595Px9867

PROBLEM: 8, 11, ['h', 'i', '9323', '2849', '5235', '985', 'I', 'i', 'M', 'd', '3963', '6627', 'm', 'z', '7285']

SOLUTION: 3693dMi

PROBLEM: 5, 19, ['e', '2663', 'R', 'r', '8371', 'S', '2893', 'E', 'F', 'w', '9141', 'F', '589', 'U', '7513', 'I', 'p', 'p', 'd', '2973', '2831', '8697', '7493', 'D', 'H', 'M', 'j']

SOLUTION:
dppI3157U985F1419wFE3982S1738