feet-_eet-_eet_ _ _-_ _ _ eet sweep-s_eep-s_ eep-_eep it-_it-_it-_it-_it-_it_ _ _
问题描述：
feet-_eet-_eet_ _ _-_ _ _ eet sweep-s_eep-s_ eep-_eep it-_it-_it-_it-_it-_it_ _ _
feet-_eet-_eet_ _ _-_ _ _ eet
sweep-s_eep-s_ eep-_eep
it-_it-_it-_it-_it-_it_ _ _
cat-_at-_at-_at-_at-_ _at
ate-_ate-_ate-_ate-_ _ ate
noon-_oon-_oon-_ _ oon
an-_an-_an-an_-an_-_an_
答
feet-meet-meeting-street
sweep-sheep-sleep-deep
it-bit-fit-kit-sit-sitter
cat-hat-sat-rat-eat-coat
ate-mate-gate-late-skate
noon-soon-moon-spoon
an-can-man-and-ann-hand