If we plant 5-space, we simply type in 5 parts, if we divide the space into 10 parts, but use four types of plants, we will plant a turnover by conversion 1 to convert the plant of the same type used in the 6th. Convert 2 with 7 and 3 conversion with conversion, cultivated in round 2 plants ever grown that converts 1 we just introduced in the 2nd converter ever grown in 6 it is grown in plots 7, hence the plant circulating in 5 sets.