C1111233133313231133133313331333133313231312111133131133133313223211111   >>    C111123313331323113313331333133313331323131211113313113313331322321111   <<    C1111233133313231133133313331333133313231312111133131133133313223211113   >>      C1111233133313231133133313331333133313231312111133131133133313223211112   >>