import re,random s=i=input();t=lambda:re.sub("y|Y","t",chr(random.randint(33,126))) while i>-s: i-=2;u=abs(i);z=(s-u)/2-1;print(' '*(z+1)+t()+'\n'if -1==i else'')+(' '*z+t()+' '*u+t())*(i>-s)