In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.
--------
Question: ['U', 'd', '893', 'h', '9679', '315', 'H', '339', '2381', '847', '7951', 'e', '9269', '9081', 'o', '6439', 'N', '4531']

Answer: 51725


Question: ['O', '9829', '5265', 'U', 'z', '2843', '1483', '9293', '1327', '2015']

Answer: 32055


Question: ['5633', '851']

Answer:
6484