Xếp các từ sau vào 3 cách phát âm :
teacher , cuch , father , desk , stereo , engineer , mother , box , board , eraser , brother , family , doctor , telephone , sister , bench , nurse , armchair , class , watch , student , country , house
/s/ : desk , student .
/iz/ : cuch , box , bench , nurse , class , watch .
/z/ : teacher , father , stereo , engineer , mother , board , eraser , brother , family , doctor , telephone , sister , armchair , country .