i=(gets.to_i-1)/3;s="";i.times{|j|p=" "*(i-j-1);k=p+"a"+"b"*j*2+"c";puts " "+k.tr("bac"," /\\");k="|"+k+p+"|
";s=k.tr("bca"," /\\")+s+k.tr("bac",i==j+1?"_/\\":" /\\")};$><<"/"+"_"*i*2+"\\
"+s