{ int i,j=0,k,t;
for (i=0;i<n;i++)
{ k=x[i];
while (k!=0)
{t=k%10;
if(t==6) break;
else k=k/10; }
if(k==0) x[j++]=x[i];}
for(;j<n;j++) x[j]=-1;
return *x;}