C11112331312111112111133133313331333133313112113313331333133313231232211   >>    C1111233131211111211113313331333133313331311211331333133313331323123221   <<    C11112331312111112111133133313331333133313112113313331333133313231232213   >>      C11112331312111112111133133313331333133313112113313331333133313231232212   >>