C11111333133313232233133313331333133313331312111111332313232321   >>    C1111133313331323223313331333133313331333131211111133231323232   <<    C11111333133313232233133313331333133313331312111111332313232323   >>      C11111333133313232233133313331333133313331312111111332313232322   >>