Solution
= Solution
The <pumping lemma for context-free languages> states that every <context-free language> $L$ has a <pumping length> $p$ such that every $w\in L$ with $|w|\geq p$ can be written
$$
w=uvxyz
$$
with $|vxy|\leq p$, $|vy|>0$, and $uv^ixy^iz\in L$ for every integer $i\geq0$.