Q: In this task, you are given an input list. A list contains several comma-separated items written within brackets. You need to return the count of all the numerical elements in the given list. Return 0 if no numerical element in the list.
['3531', 'O', '4403', 'R', '6535', 'O', '1633', '4593', 'x', '8347', 'V', '1199', 'X', '7753', '3473', '7795', 'z', '55', 's', 'o', 'S', '6329', 'k', '539', '529', 'P', '3657', '6313', 'r', 'K', '6445', 'i', '9015', '6695', '8151', '2517']
A:
21