#include <stdio.h> #include <atcoder/all> #include <bits/stdc++.h> using namespace std; using namespace atcoder; using mint = modint998244353; #define rep(i,n) for (int i = 0; i < (n); ++i) #define Inf32 1000000001 #define Inf64 4000000000000000001 int main(){ string s; cin>>s; int cur = 0; int ans = 0; rep(i,s.size()){ if(s.substr(i,9)=="yukicoder"){ cur++; ans = max(ans,cur); i += 8; } else{ cur = 0; } } cout<<ans<<endl; return 0; }