a ver empeza por a
a ver empeza por a !
a WORD_BOUNDARY β e ɾ WORD_BOUNDARY e m p e θ a WORD_BOUNDARY p o ɾ WORD_BOUNDARY a WORD_BOUNDARY
a WORD_BOUNDARY v e r WORD_BOUNDARY e m p e z a WORD_BOUNDARY p o r WORD_BOUNDARY a WORD_BOUNDARY