  We give a combinatorial formula for the character of a finite-dimensional
irreducible representation of the periplectic Lie superalgebra
$\mathfrak{p}(n)$. The character of irreducible module $L(\mu)$ is given by a
cancellation-free alternating sum over the characters of thick or thin Kac
modules, $\Delta(\lambda)$ or $\nabla(\lambda)$, such that there exists a
ribbon tiling of a skew Young diagram $\lambda/\mu$.
