RegEx III: Boundary Assertions

Write a regular expression that ensures the word "end" is inside of another word (e.g. "bending"). You must use RegEx boundary assertions. Non-word characters such as !, ?, etc. cannot be boundaries.

Examples

pattern = "yourregularexpressionhere"

bool(re.search(pattern, "The end of the story.")) ➞ False
bool(re.search(pattern, "Endings are pointless.")) ➞ False
bool(re.search(pattern, "Let"s send!")) ➞ False
bool(re.search(pattern, "We viewed the rendering at the end.")) ➞ True
bool(re.search(pattern, "Sometimes bending the rules is good.")) ➞ True

Notes

• You cannot use \w, *, . or + in your expression.
• You don't need to write a function, just the pattern.
• Do not remove import re from the code.
• You can find all the challenges of this series in my Basic RegEx collection.