C1111233133313231133133313331333133313231312111133133313131112212331   >>    C111123313331323113313331333133313331323131211113313331313111221233   <<    C1111233133313231133133313331333133313231312111133133313131112212333   >>      C1111233133313231133133313331333133313231312111133133313131112212332   >>