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, 18, ['b', '603', '1995', '5379', 'J', 'a', 'I', '873', 'V', '7961', '2737', 'e', '5175', '1511', '781', '4009', 'R', 'W']

I873V79612737e517515117814009RW