The military junta ruling Egypt has announced that parliamentary elections will be held in September. Rather than spending the next five months complaining, those who aren’t supporting the Muslim Brotherhood better get started actually working and organizing.

I’ll analyze this a lot more in the coming months but briefly the blocs are as follows:

Islamists: The Muslim Brotherhood says it is aiming at getting 30 percent of the seats. I think they’ll succeed. A smaller, moderate Islamist party — whose members split from the Brotherhood because they say it is too extremist — would be lucky to get any seats.

Left: There are several neo-Marxist parties, but it is not clear whether they will work together or run separately. In either case, they are unlikely to get many seats, and none at all if they compete for the limited votes that might be obtained. Probably no more than 5 percent.

Conservatives: The ex-regime’s politicians, including leaders of the ruling National Democratic Party. This group could do better than outsiders expect. If they unite and put forward coherent positions, they could take as much as 20 percent.

Nationalists: If Amr Moussa organizes his own radical nationalist party and does a good job, it might get up to 40 percent, especially if he brings in a lot of the former supporters of the Mubarak regime. This is the only group I think that could have a larger bloc than the Islamists.