C1111233131211111211113313331333133313232212111133131211331333133313112223321   >>    C111123313121111121111331333133313331323221211113313121133133313331311222332   <<    C1111233131211111211113313331333133313232212111133131211331333133313112223323   >>      C1111233131211111211113313331333133313232212111133131211331333133313112223322   >>