sentence1: Shaquan has 5 playing cards , each one is ordered by the number on it , but one card is flipped over .
  They are numbered 8 , 16 , 24 , x , 40
sentence2: Shaquan has 4 playing cards , each one is ordered by the number on it , but one card is flipped over . They are numbered 8 , 16 , 24 , x , 40