/z/ : desks, clocks
/s/ : televisions, bookselfs, lamps, students, windows, erasers
/iz/ : couches, benches
/iz/: benches, couches,
/s/: desks, lamps, students, bookshelves, clocks,
/z/: erasers, televisions, windows,
/z/ : desks , cloks
/s/ : televisions , bookselfs , lamps , students, windows , erasers
/iz/: couches., benches
study well