TASK DEFINITION: In this task, you are given an input i,A where i is an integer and A is an array. You need to find every ith element of A starting with the 1st element.
PROBLEM: 4, ['a', '621', '5341', 'k', 'c', '5261', 't', '3081', 'w', '2109', '1605', 'e', '8791', '2961', 'H', 'r', '7527', '6327', '3965', '8197']

SOLUTION: a, c, w, 8791, 7527

PROBLEM: 5, ['7085', '1705', '2331', 'f', 't', 'Y', 'S', 'Q', 'h', '6471', 'q', '291', '2835', '9829', 'R', '2701', '3823']

SOLUTION: 7085, Y, q, 2701

PROBLEM: 18, ['U', '6091', 'p', 'J', '7501', '3517', '3415', 'k', 'm', '9083', '8197', 'Z', '6107', '6605', 't', '4235', 'p', '9551', 'M', 'v', 'M', '2051', '8255', '1083', 'b', '7147', '5521', '8557', '6397', '9507', 'n', '8823', 'd', '873', '2863', '7105', 'J', 'H', 't', '5399', 'F', '1683', '1441', 'm', '2251', '4633', '3155']

SOLUTION:
U, M, J