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: 5, 20, ['2561', '9005', '8673', 'E', '2987', '501', '9875', 'A', 'O', 'j', 'e', '5841', 'T', 'I', 'x', '2525', '941', 'B', '2179', '8849', 'C', 'f', 'n', 'D', '7903']

29875019875AOje5841TIx2525941B21798849