Diffing "Try n" and ";lk;lk"

Title: Try n ;lk;lk
Author: Imre Polik Jeff Foster
Submitted: 2003-11-05 11:27:16 UTC 2003-11-05 11:40:15 UTC
Status: Passed Failed
Score: 60.0 0.0
Result: pass []
CPU Time: 0.04 0.0
Code: 
a=upper(a)
c=b
for i=';;;'
  d([a{c} 91])=1;
  d([a{b} 91])=1;
  c=find(any(d(char(a)')));
end