#include<bits/stdc++.h>
using namespace std;
int main()
{
	for(int i=1;i<=20;i++)
	{
		cout<<i<<" ";
		if(i%2==0)
		{
			cout<<"叮叮";
		}
		if(i%3==0)
		{
			cout<<"当当";
		}
		if(i%2==0||i%3==0)
			cout<<endl;
	}	    
	return 0;
}

#include<bits/stdc++.h> using namespace std; int main() { for(int i=1;i<=20;i++) { cout<<i<<" "; if(i%20) { cout<<"叮叮"; } if(i%30) { cout<<"当当"; } if(i%20||i%30) cout<<endl; }
return 0; }