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 lvNKXIBnTB5eJtMlZlhyxrEa1z6moGgVI2Fk9yMMuNV4gSuQEYmlcFvCoiey8Pkd