boca arriba boca arriba
boca arriba boca arriba .
β o̞ k a WORD_BOUNDARY a r i β a WORD_BOUNDARY β o̞ k a WORD_BOUNDARY a r i β a WORD_BOUNDARY
b o c a WORD_BOUNDARY a r r i b a WORD_BOUNDARY b o c a WORD_BOUNDARY a r r i b a WORD_BOUNDARY . WORD_BOUNDARY