func main()
	var s: []char :: cui@input()
	do s :: s.replace("yukicoder", ".")
	
	var ans: int :: 0
	for i(0, ^s - 1)
		var cnt: int :: 0
		while loop(s[i] = '.')
			do cnt :+ 1
			do i :+ 1
			if(i = ^s)
				break loop
			end if
		end while
		if(cnt > ans)
			do ans :: cnt
		end if
	end for
	do cui@print("\{ans}\n")
end func