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: 1, 3, ['7635', 'c', 'h', 'D', 'K', '7235', 'e']

SOLUTION: hc5367

PROBLEM: 11, 12, ['4217', '7725', '1753', '3049', 'd', '5543', 'z', 'o', '8859', '7469', 'M', '3863', '4729', 'K', 'o', 'b']

SOLUTION: 3683M

PROBLEM: 1, 17, ['m', 'A', '2725', '3463', '7553', 'Q', '307', '2385', 'E', 't', '3555', 'a', '9739', '5689', '5791', 'O', '6147', 'c', 'Z', 'w', '6551', 'p', '5983', '4151', 'k']

SOLUTION:
7416O197598659379a5553tE5832703Q355736435272Am