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 2lPfp0+qovZ4NDixsq5kvt62FlsLD8gN2zFX2OcNNWndgkIR+n2bpf2z5ydixn97