Time 1		x		Time 2
Time 3		x		Time 4
Time 5	AAA	x	AAA	Time 6
Time 7	AAA	x	AAA	Time 8
Time 9	AAA	x	AAA	Time 10
Time 11	AAA	x	AAA	Time 12
Time 13	AAA	x	AAA	Time 14
Time 15	AAA	x	AAA	Time 16
Time 17	AAA	x	AAA	Time 18
Time 19	AAA	x	AAA	Time 20