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:
['h', '6937', 'U', 'f', 'S', 'm', '9699', 'E', '4559', 'p', 'Z', 'o', '6409', 's', '4537', '5135', '6901', '6489', '5833', 'l']
answer:
56499


question:
['o', '8089', '2159', '943', '1255', 'w', 'Y', '3723', 'n', '7767', '2209', 'F', 'c', 'J', '5259', '4427', 'n', 'U']
answer:
35831


question:
['m', '1747', '7619', 'S', '6489', 'y', 'H', 'D', '3839', '5993', 'U', '2395', '7351', '1713', '6267', 'J', '7943']
answer:

51356