Challenge #130: Is There an Echo in Here?

[PrivateStorm]

My solution to challenge #130 is attached. I found the one tool solution.

[SeanAdams]

This was a good one - not done this kind of work with that tool before!

Spoiler

[kelly_gilbert]

My solution is similar to the other NON-one-tool solutions! I ended up with seven...

Spoiler

I knew that this could be solved with RegEx, but lookaround is a weak spot for me. Definitely need more practice!

[acrahen]

1 tool :boom:

Spoiler

\b(\w+)\s+\1\b

[jssandom]

My solution

[KMiller]

Solution attached.

[NickC]

Non RegEx route

[justynam]

My multi-tool solution

[Tom_Luthi]

I couldn't figure out the RegEx so here's my slightly more convoluted solution.