package main

import . "fmt"
import . "strings"
import . "sort"

func main() {
	var s string
	Scan(&s)
	s=ReplaceAll(s,"yukicoder","-")
	f:=FieldsFunc(s, func(c rune) bool {
		return c!='-'
	})
	Slice(f, func(i,j int)bool {
		return f[j]<f[i]
	})
	f=append(f,"")
	Println(len(f[0]))
}