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, ['Y', 'j', 'x', '2079', 'K', 'b', 'v', '5715', 'Q', 't']

SOLUTION: Y, K, Q

PROBLEM: 6, ['b', '4817', '1173', '2195', '1945', 'i', '2375', 'u', 'b', 'D', 'B', '8849', '373']

SOLUTION: b, 2375, 373

PROBLEM: 21, ['Q', 'H', '2501', '4637', '1963', 't', 'g', 'S', '5965', '983', '3325', 'a', 'z', '8113', 'l', 'W', '7971', '5285', '9999', 'b', 'R', '8105', 'D', '9987', 'X', '4455', '7981', 'G', 'p', 'K', 'S', 'O', 'V', 'Z', '9793', 'K', '6859', 'J', 'f', 'v', 'K', '1405', '8027', '2563', '6893']

SOLUTION:
Q, 8105, 8027