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: 7, 25, ['1839', '6339', 'Q', '9371', '7865', '3451', '7845', 'X', 'Z', '4023', 'J', '6609', '9723', '3459', '8903', '3651', 'U', '6025', '2347', '5079', 'c', 'O', 'V', 'u', '6467', 'I', 'K']

7845XZ4023J66099723345989033651U602523475079cOVu6467