C11111333133313232233133313331333133313331312111133133313231132221   >>    C1111133313331323223313331333133313331333131211113313331323113222   <<    C11111333133313232233133313331333133313331312111133133313231132223   >>      C11111333133313232233133313331333133313331312111133133313231132222   >>