A (yes)
1 (yes)  #?
1 (yes)  #?
1 (yes)  #?
B (no)
1 (no)   #?
1 (no)   #?
1 (no)   #?
A (yes)
1 (yes)  #?
1 (yes)  #?
1 (yes)  #?
B (no)
1 (no)   #?
1 (no)   #?
1 (no)   #?