How can I find in a string that contain words in list1 then append it in list2

Question

Here is the list1, string and the list2 should be

list1 = ["NORTH", "SOUTH", "EAST", "WEST"]

and

string = NORTHSOUTHWESTEASTWEST

I want

list2 = ["NORTH", "SOUTH", "WEST", "EAST", "WEST"]

Answer 1

With regexp matching (via combining list1 items to regex pattern):

import re

list1 = ["NORTH", "SOUTH", "EAST", "WEST"]
string = 'NORTHSOUTHWESTEASTWEST'
res = re.findall(fr'{"|".join(list1)}', string)
print(res)

---

['NORTH', 'SOUTH', 'WEST', 'EAST', 'WEST']

Answer 2

You can use regular expressions.

For example:

import re 

list1 = ["NORTH", "SOUTH", "EAST", "WEST"]
s = "NORTHSOUTHWESTEASTWEST"

pattern = re.compile("(" + r"|".join(list1) + ")" )

print( pattern.findall(s))

Output:

['NORTH', 'SOUTH', 'WEST', 'EAST', 'WEST']