package test;
import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner in=new Scanner(System.in);
		String s=in.nextLine();
		String a=new String("e");
		String b=new String("log");
		String g=new String("+");
		String h=new String("-");
		String l=new String("*");
		String m=new String("/");
		if(s.equals(a)) {
			ex E=new ex();
			ex.main("");
			
		}
		else if(s.equals(g)||s.equals(h)||s.equals(l)||s.equals(m)) {
			jjcc jc=new jjcc();
			if(s.equals(g)) {
				jc.addition();
			}
			else if(s.equals(h)) {
				jc.subtraction();
			}
			else if(s.equals(l)) {
				jc.multiplication();
			}
			else(s.equals(m)){
				jc.division();
			}
		}
		else if(s.equals(b))
		{
			Logax log=new Logax();
			log.main("");
		}
		else {
			sc SC=new sc();
			SC.main("");
		}
	}

}