倒换

倒换	dǎo huàn	to take turns / to rotate (responsibility)
倒	dǎo	to fall; to collapse; to lie horizontally / to fail; to go bankrupt / to overthrow / to change (trains or buses) / to move around / to resell at a profit
倒	dào	to invert; to place upside down or frontside back / to pour out / to tip out; to dump / inverted; upside down; reversed / to go backward / contrary to what one might expect; but; yet
换	huàn	to exchange / to change (clothes etc) / to substitute / to switch / to convert (currency)