TASK 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.
PROBLEM: 1, 21, ['t', 'E', 'd', '459', '6501', '5545', '9353', '3159', 'f', '2145', 'N', '6217', 'm', 'M', '5925', '1555', '9313', '4891', '3309', '3137', 'X', 'q', 'v']

SOLUTION: tEd4596501554593533159f2145N6217mM592515559313489133093137X

PROBLEM: 2, 9, ['K', 'B', 't', '8137', '7741', '169', '7603', 'A', '3315', 'E', 'T', 'S', '7873', 'L']

SOLUTION: Bt813777411697603A3315

PROBLEM: 7, 20, ['f', '1473', 'c', 'O', '7079', '9475', '3375', '5013', 'x', 'p', '3351', '4041', '8831', '7937', 'a', 'M', '3005', 'm', 'W', '4009', 'b', 'V', '6287', 'M', '7103', 'b']

SOLUTION:
33755013xp3351404188317937aM3005mW4009