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, 12, ['p', 'o', '2673', 'd', 'r', 'n', 'Z', 'u', 'm', '5195', '6521', '7671']

SOLUTION: 176712565915muZnrd3762o

PROBLEM: 11, 18, ['7155', 'W', '8393', 'q', 'E', 'S', 'B', '949', '4761', '8663', 'V', 'V', '5047', '4111', '3235', 'I', '1289', 'P', 'O', 'w', '8307', '6725', 'h', '735', 'j', 'x', '1061']

SOLUTION: P9821I532311147405VV

PROBLEM: 19, 21, ['8333', '2009', '4941', 'L', 'U', 'j', 'R', '6175', '4465', '373', 'N', 'P', '7045', '7577', 'j', 't', 'w', '3845', '9089', '5277', 'e', 'H', '8043', 'M']

SOLUTION:
e77259809