I'm trying to show that $L_6=\{c^n a^m b^p : n+m=p,p \geq 6\}$ is not regular.I need a little help, I was practicing the pumping lemma, and I encountered this language, I saw these conditions and got totally confused, what to do now?Earlier I showed that $L_5=\{a^n b^n : n0\}$ is not regular.In this Language it was very simple to choose $w$, namely $w= a^pb^p$, where $p$ is the pumping length. But this new Language is complicated, so I thought you guys could help me out.
Showing that $\{ c^n a^m b^{n+m} : n+m \geq 6\}$ is not regular
formal languages;regular languages;pumping lemma