C1111233133313231133133313331333133313231312111133131131133133313222221   >>    C111123313331323113313331333133313331323131211113313113113313331322222   <<    C1111233133313231133133313331333133313231312111133131131133133313222223   >>      C1111233133313231133133313331333133313231312111133131131133133313222222   >>