def tranpose(matrix):
    return [[(row.split())[i] 
            for row in matrix] 
            for i in range(len(matrix))]

def main():
    matrix = ['1 2 3 4', '5 6 7 8', '9 10 11 12', '13, 14, 15, 16']
    print(tranpose(matrix))
if __name__ == "__main__":
    main()