Magic Strings

import java.util.HashMap;
import java.util.Scanner;
import java.util.Set;
import java.util.TreeSet;
public class MagicStrings {
    public static void main(String[] args){
        Scanner scan=new Scanner(System.in);
        int number=scan.nextInt();
        int count=0;
        int[] weight={3, 4, 1 ,5};
        HashMap<Integer, String> weightMe=new HashMap<Integer, String>();
        Set<String> collection=new TreeSet<String>();
        String result="";
        weightMe.put(3, "s");
        weightMe.put(4, "n");
        weightMe.put(1, "k");
        weightMe.put(5, "p");
        for (int i1 = 0; i1 < 4; i1++) {
            for (int i2 = 0; i2 < 4; i2++) {
                for (int i3 = 0; i3 < 4; i3++) {
                    for (int i4 = 0; i4 < 4; i4++) {
                        for (int j1 = 0; j1 < 4; j1++) {
                            for (int j2 = 0; j2 < 4; j2++) {
                                for (int j3 = 0; j3 < 4; j3++) {
                                    for (int j4 = 0; j4 < 4; j4++) {
                                        if((weight[i1]+weight[i2]+weight[i3]+weight[i4])-(weight[j1]+weight[j2]+weight[j3]+weight[j4])==number)
                                        {
                                            result="" + switcher(i1) + switcher(i2) + switcher(i3) + switcher(i4) + switcher(j1) + switcher(j2) + switcher(j3) + switcher(j4);
                                            collection.add(result);
                                            count++;
                                        }
                                        else if((weight[i1]+weight[i2]+weight[i3]+weight[i4])-(weight[j1]+weight[j2]+weight[j3]+weight[j4])==(number*-1)){
                                            result="" + switcher(i1) + switcher(i2) + switcher(i3) + switcher(i4) + switcher(j1) + switcher(j2) + switcher(j3) + switcher(j4);
                                            collection.add(result);
                                            count++;
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
        if(count==0){
            System.out.println("No");
        }
        else{
            for(String alphaCollect : collection){
                System.out.println(alphaCollect);
            }
        }
    }
    public static String switcher(int zeroToFour){
        String result="";
        switch(zeroToFour){
        case 0:
            result="s";
            break;
        case 1:
            result="n";
            break;
        case 2:
            result="k";
            break;
        case 3:
            result="p";
            break;
        }
        return result;
    }
}