#include<iostream> #include<cstdio> using namespace std; int main() { long long a; cin>>a; if(a%3==0&&a%5==0){ cout<<"can"; }else if(a%3==0&&a%5!=0){ cout<<"cannot"; }else if(a%3!=0&&a%5==0){ cout<<"cannot"; }else if(a%3!=0&&a%5!=0){ cout<<"cannot"; } return 0; }