Sum of Positive Integers

Create a function that takes a string containing integers as well as other characters and return the sum of the positive integers only.

Examples

positive_sum("-12#-33 13%14&-11") ➞ 27
# 13 + 14 = 27

positive_sum("22 13%14&-11-22 13 12 0") ➞ 74
# 22 + 13 + 14 + 13 + 12 = 74

positive_sum("0 12 12 2") ➞ 26

Notes

• There is at least one positive integer.
• Each integer is separated by a space, #, %, &, etc.