1 Erratum to: J Algebr Comb DOI 10.1007/s10801-014-0529-2

In Example 4.3 (iv), lines 2 and 4, the original correct expressions are \(g=b^{n_0}c_{n_1}\cdots c_{n_\ell }\) and \(g=c_{n_1}\cdots c_{n_\ell }\), respectively.