C11112331312111112111133133313331333133313132211312111112113313232211   >>    C1111233131211111211113313331333133313331313221131211111211331323221   <<    C11112331312111112111133133313331333133313132211312111112113313232213   >>      C11112331312111112111133133313331333133313132211312111112113313232212   >>