#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <atcoder/modint>
#include <atcoder/string>
using namespace std;
using i32 = int;
using u32 = unsigned int;
using i64 = long long;
using u64 = unsigned long long;
#define rep(i,n) for(int i=0; i<(int)(n); i++)
const i64 INF = 1001001001001001001;

using Modint = atcoder::static_modint<998244353>;

int main(){
    string S; cin >> S;
    string yukicoder = "yukicoder";
    while(yukicoder.size() < S.size()) yukicoder += yukicoder;
    auto Z = atcoder::z_algorithm(yukicoder + S);
    int ans = 0;
    rep(i,S.size()) ans = max(ans, Z[yukicoder.size() + i] / 9);
    cout << ans << endl;
    return 0;
}



struct ios_do_not_sync{
    ios_do_not_sync(){
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
    }
} ios_do_not_sync_instance;