function u=jiaozhi(d,flag)
if nargin==1
   flag=1;
end
N=length(d)/456;
for n=0:N-1      %先重排  將前四組加到前四個子組的奇數位，后四組加到后四個子組的偶數位
   for x=1:8
       for y=1:57
         coef=mod(57*(x-1)+64*(y-1)+1,456);
           if coef==0
              coef=456;
           end
         D(8*n+x,y)=d(456*n+coef);
       end       
    end
end
for n=0:N-1           %再交織
    for i=1:4
             u(4*n+i,1:2:113)=D(8*n+i,:);
             u(4*n+i+4,2:2:114)=D(8*n+i+4,:);
    end
end
u=reshape(u',1,4*114*(N+1));