Azuma

1.
4 _* x8 ~1 }3 x  ~( B- C1-6 vs 7-12' J/ Y+ L  P- _+ x; K' C1 k* L0 d) B7 W9 ^
if 1-6 = 7-12     13 is fake
3 u* G# _- [' _% T
/ E: `$ o! d& U- Oif not
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( N9 e" e/ s9 V( J# BWeight the 2 time
; r, _1 O2 n6 C% j / L* P, s0 H% X2 d& ~
Suppose 1-6> 7-12
. A3 G5 n: ~/ |& _% F6 G: K! B9 P% Q- n- W' H
1-3 vs 4-6
! X4 b4 c$ M* ~# @7 C3 {+ w7 i1 j  }) D
Then Weight the Third; o3 T8 g! e0 t* U0 h; \, f
3.
0 d  M0 j* E6 G
9 G: p  U& P8 |' I' lSuppose 4-6 > 1-3+ n& Z8 _4 ~. D, p! s8 D
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Just like the first Step. K9 A& w% v' q! w: y$ F% h3 _: T

4 i% n' d7 Z$ U) y4 vs 5 2 a( m! K% P- F* X" ^' N# R
) {+ X: a$ l9 Z
if 4=5 6 is the fake one
: w. U* ^7 c5 n5 q$ r) G- J' q$ E, s
% p  c4 T) P4 Bif 4>5  4 is the fake one
. p# D' A; Y. r& [5 B) E; [+ k8 S. A# W+ e3 I: ]9 P7 K- a; W% b
and so on......................