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.

Ex Input:
1, 2, ['D', '5207']

Ex Output:
D5207


Ex Input:
1, 2, ['3877', '2107']

Ex Output:
38772107


Ex Input:
1, 2, ['v', 'R']

Ex Output:

vR