Azuma

1.
+ S! {: C- S/ [. B5 U1-6 vs 7-12$ z/ [7 a6 U8 S' d7 E
if 1-6 = 7-12     13 is fake: ?" z; H  f1 q! ], e
8 C% Z' y" U) _2 ?& }% B
if not
6 |  {  w; x. ~9 P7 a8 S% X, s; r1 X- I+ v* I
Weight the 2 time # t" f3 q2 a* w) i

5 G5 E- I, U% qSuppose 1-6> 7-12! G: z! e3 E  b0 A" I2 m5 p' ?
6 I3 r9 w2 P9 w- ?
1-3 vs 4-6 ! W2 ^* R8 J/ f( Z" a4 S* q) ]

: h. d( f0 R/ e2 o: G+ iThen Weight the Third# d* v, X6 p. q$ C  ^7 Q
3.
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1 |( S# p; W; |, ]4 }9 W3 l9 Y' ]Suppose 4-6 > 1-3
. E5 |& q  u/ J% X6 Y& Y% U
' ~4 t% f$ Y; f( M2 Y- jJust like the first Step" T7 H7 ]3 T+ c# _! H
  V$ R" [9 O) A2 c6 e
4 vs 5
6 R: U- N* u9 \5 ^4 b  p
0 ~: W5 x; _6 X. d7 p% _if 4=5 6 is the fake one   ]5 l1 m2 I2 o( F

7 i1 W: s6 m" m) `0 y5 }7 r2 Kif 4>5  4 is the fake one 7 M* ~* S- B6 O3 k9 q* k7 F
5 c0 T$ R0 A1 `$ N& G/ K
and so on......................