C11111333133313232233133313331333133313231312111113331311312321   >>    C1111133313331323223313331333133313331323131211111333131131232   <<    C11111333133313232233133313331333133313231312111113331311312323   >>      C11111333133313232233133313331333133313231312111113331311312322   >>