C11112331312111112111133132313331333133313232212111133132211233132222221   >>    C1111233131211111211113313231333133313331323221211113313221123313222222   <<    C11112331312111112111133132313331333133313232212111133132211233132222223   >>      C11112331312111112111133132313331333133313232212111133132211233132222222   >>