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: 7, 10, ['417', '8131', '7239', '9699', 'z', 'H', 'P', '9349', '4835', '3217', '9899']

SOLUTION: 712353849439P

PROBLEM: 4, 4, ['I', 'i', 'b', '2703']

SOLUTION: 3072

PROBLEM: 11, 14, ['553', '6995', 'B', 'j', 'l', 'v', 'p', '6257', 'j', '299', 'g', '833', '881', '933', 'K', 'g', '3435', 'h', 'm', '1123', '4283', 'A', '9705']

SOLUTION:
339188338g