m1 m3 m1 m3
m1 m3 m1 m3
v co v co
m1 m3 m1 m3 .
m̩˥ WORD_BOUNDARY m̩˧ WORD_BOUNDARY m̩˥ WORD_BOUNDARY m̩˧ WORD_BOUNDARY
m 1 WORD_BOUNDARY m 3 WORD_BOUNDARY m 1 WORD_BOUNDARY m 3 WORD_BOUNDARY . WORD_BOUNDARY