“…Note that S bLSP ({a, b, c}) = {L a , L b , L c , λ abc , λ acb , λ bac , λ bca , λ cab , λ cba }. Observe that these morphisms are the mirror morphisms of Arnoux-Rauzy and Poincaré morphisms (here f is a mirror morphism of g if f (a) is the mirror image or reversal of g(a) for all letters a) used by V. Berthé and S. Labbé [5].…”