Definition: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to concatenate all elements of A from the ith element to the jth element, and print the resultant 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.
Input: 1, 12, ['8851', 'x', 'U', 'a', 'm', '8671', '8053', 's', 'C', 'G', '4267', '7695', '9927', 'c', '6885', 'O']

8851xUam86718053sCG42677695