C11112331312111112111133133313331333133313112113313331333133313231323223313221   >>    C1111233131211111211113313331333133313331311211331333133313331323132322331322   <<    C11112331312111112111133133313331333133313112113313331333133313231323223313223   >>      C11112331312111112111133133313331333133313112113313331333133313231323223313222   >>