import java.util.*; 
import java.io.*;
import java.math.*;
import java.util.stream.*;
import java.util.function.*;

class Main implements Runnable {

    boolean DEBUG = true ;


    public void solve() {   
        int k = in.nextInt();
        char [] nupc = {'N','U','P','C'};
        TreeSet<String> set = new TreeSet<>();
        for(int i = 0 ; i < (1 << 4) ; i ++) {
            StringBuilder sb = new StringBuilder();
            for(int j = 0 ; j < 4 ; j ++) {
                sb.append(nupc[j]);
                if(((i >> j) & 1) == 1) sb.append(sb.toString());
            }
            set.add(sb.toString());
        }
        int ans = 0 ;
        for(String v : set) if(++ans == k) {
            out.println(v);
            return;
        }
    }   
    
    public PrintWriter out = new PrintWriter(System.out);
    public Input in = new Input();
    public static final int  inf = (1  << 30);
    public static final long lnf = (1L << 60);
    public static final String yes = "Yes" , no  = "No" ;
    public static final String YES = "YES" , NO  = "NO" ;
    public static final int mod7 = 1000000007 , mod9 = 998244353 ;
    public static final int [] dy4 = {-1,0,1,0} , dx4 = {0,1,0,-1} ;
    public static final int [] dy8 = {-1,-1,-1,0,1,1,1,0} , dx8 = {-1,0,1,1,1,0,-1,-1} ;

    public static void main(String [] args) { new Thread(null, new Main(), "", Runtime.getRuntime().maxMemory()).start(); }
    public void run() { solve(); out.flush(); }

    public void fill (int  [] array , int  e) { Arrays.fill(array , e) ; }
    public void fill (long [] array , long e) { Arrays.fill(array , e) ; }
    public void fill (int  [][] array , int  e) { for(int i = 0 ; i < array.length ; i ++) fill(array[i] , e) ; }
    public void fill (long [][] array , long e) { for(int i = 0 ; i < array.length ; i ++) fill(array[i] , e) ; }

    public int    [] sort(int    [] array) { int    [] p = new int   [array.length]; Arrays.sort(p); return p ; }
    public long   [] sort(long   [] array) { long   [] p = new long  [array.length]; Arrays.sort(p); return p ; }
    public String [] sort(String [] array) { String [] p = new String[array.length]; Arrays.sort(p); return p ; }

    public int  min(int  ... array) { int  min = inf  ; for(int  v : array) min = Math.min(min , v) ; return min ; }
    public long min(long ... array) { long min = lnf  ; for(long v : array) min = Math.min(min , v) ; return min ; }

    public int  max(int  ... array) { int  max = -inf ; for(int  v : array) max = Math.max(max , v) ; return max ; }
    public long max(long ... array) { long max = -lnf ; for(long v : array) max = Math.max(max , v) ; return max ; }

    public int  sum(int  ... array) { int  sum = 0 ; for(int  v : array) sum += v ; return sum ; }
    public long sum(long ... array) { long sum = 0 ; for(long v : array) sum += v ; return sum ; }

    public String toString(int  a) { return Integer.toString(a); }
    public String toString(long a) { return Long.toString(a);    }

    public int  parseInt (String a) { return Integer.parseInt(a) ; }
    public long parseLong(String a) { return Long.parseLong(a)   ; }

    public int  [] random(int n , int lower  , int  upper) { return new Random().ints (n , lower , upper).toArray() ; }
    public long [] random(int n , long lower , long upper) { return new Random().longs(n , lower , upper).toArray() ; } 

    public void DEBUG(int    [] a) { System.out.println(Arrays.toString(a)) ; }
    public void DEBUG(long   [] a) { System.out.println(Arrays.toString(a)) ; }
    public void DEBUG(String [] a) { System.out.println(Arrays.toString(a)) ; }
    public void DEBUG(char   [] a) { System.out.println(Arrays.toString(a)) ; }
    public void DEBUG(double [] a) { System.out.println(Arrays.toString(a)) ; }
    public void DEBUG(boolean[] a) { System.out.println(Arrays.toString(a)) ; }
    public void DEBUG(int    [][] a) { for(int i = 0 ; i < a.length ; i ++ ) System.out.println(Arrays.toString(a[i])) ; }
    public void DEBUG(long   [][] a) { for(int i = 0 ; i < a.length ; i ++ ) System.out.println(Arrays.toString(a[i])) ; }
    public void DEBUG(String [][] a) { for(int i = 0 ; i < a.length ; i ++ ) System.out.println(Arrays.toString(a[i])) ; }
    public void DEBUG(char   [][] a) { for(int i = 0 ; i < a.length ; i ++ ) System.out.println(Arrays.toString(a[i])) ; }
    public void DEBUG(double [][] a) { for(int i = 0 ; i < a.length ; i ++ ) System.out.println(Arrays.toString(a[i])) ; }
    public void DEBUG(boolean[][] a) { for(int i = 0 ; i < a.length ; i ++ ) System.out.println(Arrays.toString(a[i])) ; }

}

class Input {

    private final InputStream in = System.in;
    private final Scanner sc = new Scanner(System.in);
    private final byte[] buffer = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;

    private boolean hasNextByte() {
        if (ptr < buflen) {
            return true;
        }else{
            ptr = 0;
            try {
                buflen = in.read(buffer);
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (buflen <= 0) {
                return false;
            }
        }
        return true;
    }

    private int readByte() { 
        if (hasNextByte()) return buffer[ptr++]; else return -1;
    }

    private static boolean isPrintableChar(int c) { 
        return 33 <= c && c <= 126;
    }

    private  boolean hasNext() { 
        while(hasNextByte() && !isPrintableChar(buffer[ptr])) {
            ptr++; 
        }
        return hasNextByte();
    }
    
    public String next() {
        if (!hasNext()) throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while(isPrintableChar(b)) {
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }

    public long nextLong() {
        if (!hasNext()) throw new NoSuchElementException();
        long n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        if (b < '0' || '9' < b) {
            throw new NumberFormatException();
        }
        while(true){
            if ('0' <= b && b <= '9') {
                n *= 10;
                n += b - '0';
            }else if(b == -1 || !isPrintableChar(b)){
                return minus ? -n : n;
            }else{
                throw new NumberFormatException();
            }
            b = readByte();
        }
    }

    public int nextInt() {
        long nl = nextLong();
        if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
        return (int) nl;
    }

    public double nextDouble() { 
        return Double.parseDouble(next());
    }

    public char nextChar() {
        return next().charAt(0);
    }

    public BigInteger nextBigInteger() {
        return sc.nextBigInteger();
    }

    public int [] nextInt(int n) {
        int [] array = new int[n];
        for(int i = 0 ; i < n ; i ++) {
            array[i] = nextInt();
        }
        return array ;
    }

    public int [][] nextInt(int n , int m) {
        int [][] array = new int[n][m];
        for(int i = 0 ; i < n ; i ++) {
            array[i] = nextInt(m);
        }
        return array ;
    }

    public long [] nextLong(int n) {
        long [] array = new long[n];
        for(int i = 0 ; i < n ; i ++) {
            array[i] = nextLong();
        }
        return array ;
    }

    public long [][] nextLong(int n , int m) {
        long [][] array = new long[n][m];
        for(int i = 0 ; i < n ; i ++) {
            array[i] = nextLong(m);
        }
        return array ;
    }

    public double [] nextDouble(int n) {
        double [] array = new double[n];
        for(int i = 0 ; i < n ; i ++) {
            array[i] = nextDouble();
        }
        return array ;
    }
    
    public String [] next(int n) {
        String [] array = new String[n];
        for(int i = 0 ; i < n ; i ++) {
            array[i] = next();
        }
        return array ;
    }

    public String [][] next(int n , int m) {
        String [][] array = new String[n][m];
        for(int i = 0 ; i < n ; i ++) {
            array[i] = next(m);
        }
        return array ;
    }

    public char [] nextChar(int n) {
        return next().toCharArray();
    }

    public char [][] nextChar(int n , int m) {
        char [][] array = new char[n][m];
        for(int i = 0 ; i < n ; i ++) {
            array[i] = nextChar(m);
        }
        return array ;
    }

}