ch tchou tchou tchou
tchou tchou tchou
co co co
ch tchou tchou tchou .
s e a ʃ WORD_BOUNDARY t ʃ u WORD_BOUNDARY t ʃ u WORD_BOUNDARY t ʃ u WORD_BOUNDARY
c h WORD_BOUNDARY t c h o u WORD_BOUNDARY t c h o u WORD_BOUNDARY t c h o u WORD_BOUNDARY