content: package v102;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.PrintWriter;
  import java.math.BigInteger;
  import java.util.StringTokenizer;
  
  
  public class SimplyEmirp_UVa10235 {
  
  	public static void main(String[] args) throws IOException 
  	{
  		Scanner sc = new Scanner(System.in);
  		PrintWriter out = new PrintWriter(System.out);
  		
  		while(sc.ready())
  		{
  			String s;
  			StringBuilder sb = new StringBuilder(s = sc.next());
  			BigInteger a = new BigInteger(s);
  			BigInteger b = new BigInteger(sb.reverse().toString());
  			if(!a.isProbablePrime(10))
  				out.printf("%s is not prime.\n", s);
  			else if(!b.isProbablePrime(10) || a.compareTo(b) == 0)
  				out.printf("%s is prime.\n", s);
  			else
  				out.printf("%s is emirp.\n", s);
  		}
  		out.flush();
  		out.close();
  	}
  	
  
  	static class Scanner
  	{
  		StringTokenizer st;
  		BufferedReader br;
  
  		public Scanner(InputStream s){	br = new BufferedReader(new InputStreamReader(s));}
  
  		public String next() throws IOException 
  		{
  			while (st == null || !st.hasMoreTokens()) 
  				st = new StringTokenizer(br.readLine());
  			return st.nextToken();
  		}
  
  		public int nextInt() throws IOException {return Integer.parseInt(next());}
  
  		public long nextLong() throws IOException {return Long.parseLong(next());}
  
  		public String nextLine() throws IOException {return br.readLine();}
  
  		public double nextDouble() throws IOException
  		{
  			return Double.parseDouble(next());
  		}
  
  		public boolean ready() throws IOException {return br.ready();}
  
  
  	}
  }