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: 10, 21, ['j', 'T', 'j', '4675', '5987', '1443', '2019', 'I', '7791', 'C', 'n', 'D', 'r', 'O', 't', '3195', '3657', 'o', 'C', '2955', 'k', 'U']

CnDrOt31953657oC2955k