图1-16是用火柴摆成的猪,想想看,如何移动2根火柴,使它变成四腿张开的猪?
图1-16 sD/XEdJanCMzOF5ov7PpW5h0yq2ZwcmHum5nyhyFnKcxXw4VRskMbJdYUIXhYvFz