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)
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