Azuma

1.6 D; |& i1 b$ F
1-6 vs 7-12
* `2 O6 m# o! j+ ]5 xif 1-6 = 7-12     13 is fake0 O8 O, M8 K& ?+ e/ W9 ]( h1 d
6 l1 @+ r0 q( Z
if not % _+ E! n$ d3 B! i2 L9 A

% p/ I9 B* _( t+ x) P: ^. i! AWeight the 2 time
; {. Z: j* U3 ~. x3 f0 ^
3 T  }; O) b6 [1 C- [Suppose 1-6> 7-12
7 u/ N) k! q9 C8 t2 i
; n  h9 C% a1 W1-3 vs 4-6
( r/ _* V& e! p# T) k
( ]/ `1 y# w& [7 |6 L0 jThen Weight the Third
3 ^* ^) A! G0 u0 n+ y9 f3.; v3 h' f, F  E6 b2 l

4 U( r! c6 U7 }! tSuppose 4-6 > 1-3
: v7 W4 }  D6 [: {# C3 S/ q* m3 T* E5 I
Just like the first Step
  J( @9 S0 K- x: b. g/ J# G) Q& F" e* p# t0 m5 e
4 vs 5 . c5 c0 c$ @1 L6 ?- S5 }

6 J- w/ J% Q+ @' hif 4=5 6 is the fake one
7 J' s& J+ G0 p
) c* r6 h) ^/ h4 z2 M* o6 @3 aif 4>5  4 is the fake one 8 P& U3 L6 C! j# A6 ]4 [

9 u" W7 H7 O) B3 R% O; I3 D. P  Tand so on......................