import io
import sys

_INPUT = """\
6
yukicoderaayukicoderyukicoder
codeforces
yukicoderyukicoderyukicoderyukicoderyukiyukicoderyukicoderyukicoder
yukiyukicodercoder
"""

def solve(test):
  S=input()
  x=[]
  now=0
  while now<len(S):
    if S[now:min(now+9,len(S))]=='yukicoder':
      x.append('')
      now=now+9
    else:
      x.append('a')
      now+=1
  x.append('a')
  ans=0
  now=0
  for i in range(len(x)):
    if x[i]!='': ans=max(ans,i-now); now=i+1
  if test==0:
    print(ans)
  else:
    return None

def random_input():
  from random import randint,shuffle
  N=randint(1,10)
  M=randint(1,N)
  A=list(range(1,M+1))+[randint(1,M) for _ in range(N-M)]
  shuffle(A)
  return (" ".join(map(str, [N,M]))+"\n"+" ".join(map(str, A))+"\n")*3

def simple_solve():
  return []

def main(test):
  if test==0:
    solve(0)
  elif test==1:
    sys.stdin = io.StringIO(_INPUT)
    case_no=int(input())
    for _ in range(case_no):
      solve(0)
  else:
    for i in range(1000):
      sys.stdin = io.StringIO(random_input())
      x=solve(1)
      y=simple_solve()
      if x!=y:
        print(i,x,y)
        print(*[line for line in sys.stdin],sep='')
        break

#0:提出用、1:与えられたテスト用、2:ストレステスト用
main(0)