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: 4, 4, ['w', '3895', '4989', '7875', 'u']

SOLUTION: 5787

PROBLEM: 10, 27, ['z', '7203', 'd', '1795', '45', '1803', 'L', '2839', '6285', 'W', '1969', 'x', '6565', '8849', '6091', 'M', '7925', '37', 'h', '381', '59', 'O', '3283', 'u', '9831', 'Y', '5701', '7249', 'w']

SOLUTION: 1075Y1389u3823O95183h735297M190694885656x9691W

PROBLEM: 14, 15, ['g', '6569', '5699', 'h', '8131', 'n', 'd', '9209', 'W', '5121', 'P', 'I', 'Z', '341', 'p', 'h', 'U', '421', '5445', '8325']

SOLUTION:
p143