TASK DEFINITION: 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.
PROBLEM: ['v', 'a', 'O', 'S', 'r', 'T', 'r', 'K', 'K', '7781', '1749']

SOLUTION: 9530

PROBLEM: ['S', 'W', '2171', '6405', 'h', 'C', '1597', '7109', 'Q', 'p', '2747', 't', 'J', 'q', '1883', 'v', 'O']

SOLUTION: 21912

PROBLEM: ['N', 'O', '2467', '9881', '7883', '167', 'E', '4001', 'V', 'T', 'A', '3657', '199', '9203', '1763', 'P', '7953', 'R', 'U']

SOLUTION:
47174