If the buses on the left and right face the same leftward direction, but one has a flat front while the other has a hood that projects forward.
return bus ;return #1 on the  left ;return #1 on the  right ;return if  #2 faces the  leftward direction ;return if  #3 faces the  leftward direction ;return if  both  #4 and #5 are true ;return one bus ;return the  other bus ;return front of #7 ;return if  #9 is flat ;return hood of #8 ;return if  #11 projects forward ;return if  both  #10 and #12 are true ;return if  both  #6 and #13 are true
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