instruction:
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:
['v', 'a', 'O', 'S', 'r', 'T', 'r', 'K', 'K', '7781', '1749']
answer:
9530


question:
['w', '1335', 'G', 'h', '6729', '1999', 'u', 'I', 'r', 'm', '4757', 'W', '3715', '701', '1999']
answer:
21235


question:
['3851', 'M', 'O', 'W', 'X', '3521', 'o', 'p', 'O', 'k', '4835', 'j', 'B', 'n', 'v', 'S', '7151', 'S', '1767', 'f']
answer:

21125