C :

#include<stdio.h>
int main()
{
  int n;
  scanf("%d",&n);
  if(n%3==0&&n%5==0)
    printf("can");
  else
    printf("cannot");
    return 0;
}

C++ :

#include<stdio.h>
int main()
{
	int n;
	scanf("%d",&n);
	if(n%3==0&&n%5==0)
	{
		printf("can\n");
	} 
	else
	    printf("cannot\n");
	return 0;
}

Java :

import java.util.*;

public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		if(n%3==0&&n%5==0)System.out.println("can");
		else System.out.println("cannot");
	}
}