#include using namespace std; using ull = unsigned long long; using ll = long long; using lli = long long int; using ld = long double; using pa = pair; using ppa = pair; #define SORT(v, n) sort(v, v+n); #define ALL(v) v.begin(),v.end() #define VSORT(v) sort(ALL(v)) #define GRESORT(v) sort(ALL(v),greater()) #define REVERSE(v) reverse(ALL(v)) #define overlap(v) v.erase(unique(ALL(v)),v.end()) #define debug(x) cout << #x << ": " << x << endl #define FOR(i,a,b) for(int i = (a); i < (b); i++) #define rep(i,n) FOR(i,0,n) #define RFOR(i,a,b) for(int i = (b-1); i >= a; i--) #define rrep(i,n) RFOR(i,0,n) #define INF INT_MAX #define SUP INT_MIN #define mins(a,b) a = min(a,b) #define maxs(a,b) a = max(a,b) //4近傍 //int dy[]={0, 1, 0, -1}; //int dx[]={1, 0, -1, 0}; //8近傍 //int dy[]={0,0,1,-1,1,1,-1,-1}; //int dx[]={1,-1,0,0,1,-1,1,-1}; const ll MOD = 1000000007; ll pow_mod(ll a,ll b,ll mod){ ll tmp = 1; a %= mod; if(b > 0){ tmp = pow_mod(a, b/2, mod); if(b % 2) tmp = (((tmp*tmp)%mod)*a)%mod; else tmp = (tmp*tmp)%mod; } return tmp; } void solve() { int n; string s = " yukicoder"; while(cin >> n){ if(n == 0) return; cout << s[n] << endl; } } int main(){ std::ios::sync_with_stdio(false); std::cin.tie(0); solve(); return 0; }