∴ 1 1 on Boshang,
∴ "12" in Lei Company,
∫ Every five rounds,
20 1 1÷5=402 The remainder is 1,
Every five rounds, the vertex cycles exactly once, and when 402÷5=80, the remainder is 2.
∴ "2011"is the same as the first number in the third round.
I.e. the same position as 9,
∴ "2011"is on Leibo.
So the answer is: CO, bo.