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20 questions
A
B
C
D
A
B
C
D
E
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
14
21
42
91
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
12
13
15
18
12
24
32
48
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