o hemen bik eta hemen
o hemen bik eta hemen .
o WORD_BOUNDARY e m e n WORD_BOUNDARY b i k WORD_BOUNDARY e t a WORD_BOUNDARY e m e n WORD_BOUNDARY
o WORD_BOUNDARY h e m e n WORD_BOUNDARY b i k WORD_BOUNDARY e t a WORD_BOUNDARY h e m e n WORD_BOUNDARY