C11111333133313232233133313331333133313231312331323133311212321   >>    C1111133313331323223313331333133313331323131233132313331121232   <<    C11111333133313232233133313331333133313231312331323133311212323   >>      C11111333133313232233133313331333133313231312331323133311212322   >>