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: 2, 3, ['2661', 'T', '8855', 'I', 'f', 'P']

SOLUTION: 5588T

PROBLEM: 3, 6, ['e', 'w', '503', '2677', '4099', 'F', '4781', '3995', '8221', 'z', '6689', 'L', '3821', 'b', 'A', 'P', '4037', 'v', 'M', '3919']

SOLUTION: F99047762305

PROBLEM: 3, 10, ['7731', '993', 'O', 'H', 'k', 'l', 'd', 'S', '1261', 'P', 'B', 'w', 'u']

SOLUTION:
P1621SdlkHO