Semigroups of matrices with dense orbits

We give examples of $n\times n$ matrices $A$ and $B$ over the filed $\mathbb{K}=\mathbb{R}$ or $\mathbb{C}$ such that for almost every column vector $x\in {\mathbb{K}}^n$, the orbit of $x$ under the action of the semigroup generated by $A$ and $B$ is dense in ${\mathbb{K}}^n$.