import java.io.FileReader; 
import java.io.BufferedReader; 
import java.math.BigInteger; 
import java.util.StringTokenizer; 
 
public class Problem1 { 
 
 public static void main(String args[]) throws Exception { 
 BufferedReader in = new BufferedReader(new FileReader("q1.txt")); 
 StringTokenizer st; 
 BigInteger a, p, m, n,pm; 
 int i; 
 while(in.ready()) { 
 st = new StringTokenizer(in.readLine()); 
 a = new BigInteger(st.nextToken()); 
 p = new BigInteger(st.nextToken()); 
 m = new BigInteger(st.nextToken()); 
 n = new BigInteger(st.nextToken()); 
 System.out.println("a = "+ a); 
 System.out.println("p = "+ p); 
 System.out.println("m = "+ m); 
 System.out.println("n = "+ n); 
 i = 1; 
 pm = new BigInteger(p.toString()); 
 
 while(i < m.intValue()) { 
 System.out.println("pass: " + i); 
 pm = pm.pow(p.intValue()); 
 i++; 
 } 
 System.out.println("p^p m veces = "+ pm); 
 System.out.println("Resultado: "+a.modPow(pm,n)); 
 } 
 } 
}