(a) bread (b) sock
(b) sock
(a) bread (b) lunch
(a) bread
(a) lunch (b) duck
(b) duck
(a) lake (b) swimmers
(a) lake
(a) swimmers (b) shore
(b) shore
(a) sock (b) swimmers
(b) swimmers
(a) hot (b) cool
(a) hot
(a) bread (b) lunch
(b) lunch