 a sequence $B_0,  B_0,  \dots, B_\ell$ of [pseudobracket system]{}s is called [*operational*]{}. We say that a sequence $B_0,  B_0,  \dots, B_\ell$ of [pseudobracket system]{}s has [*size bounded by*]{} $ (k_0, k_0)$ if $\ell \le k_0$ and, for every $i$, the number of [pseudobracket]{}s in $B_i$ is at most $k_0$. Whenever it is not ambiguous, we also say that $\Omega$ has size bounded by $(k_0, k_0)$ if so does the corresponding to $\Omega$ sequence $B_0,  B_0,  \dots, B_\ell$ of [pseudobracket system]{}s.  