The starting station of the city bus sends out a No. 1 bus every 10 minutes, and a No. 3 bus every 12 minutes. If a No. 1 bus and a No. 3 bus are issued at the same time at 6 o'clock in the morning, then at least how many At the same time, the two vehicles will be issued separately.
市公交车始发站每隔10分发出一辆1路车，每隔12分发出一辆3路车，如果早6时同时发出一辆1路车和一辆3路车，那么至少在多少时又会同时各发出这两路车．
<result>7</result>