a=[]
o=""
n=s="@abcdefghi"
for(j=i=0;n;o+=' '+a[i],++i%33||(print(o),o=''))if(!a[i])for(n=[18,15,7,8,14,4,10,1,9][j++],z=n*n;z;)a[i+(--z/n|0)*33+z%n]=s[j]