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.

Ex Input:
['X', '6189', '5435', 'y', '8931', '8987', 'F', '8377', 'k', '8631', '8717', 'q', '2923', 'g', '7225', 'j']

Ex Output:
65415


Ex Input:
['3497', '761', '6157', 'J', 'n', '139', '9895', '2939', 'K', 'I', '2161', 'c', 'a', '485', '7959', 'i', '4753', '3305', 'G', '3475']

Ex Output:
45526


Ex Input:
['5205', 'N', '8061', 'I', 'c', '5525', '6669', '8279', '2669', '7827', '7263', 'J', '997', '5157', 'Y', 'R']

Ex Output:

57652