You are given the string s of length n and the numbers p, q. Split the string s to pieces of length p and q.

For example, the string "Hello" for p = 2, q = 3 can be split to the two strings "Hel" and "lo" or to the two strings "He" and "llo".

Note it is allowed to split the string s to the strings only of length p or to the strings only of length q (see the second sample test).

Input

The first line contains three positive integers n, p, q (1 ≤ p, q ≤ n ≤ 100).

The second line contains the string s consists of lowercase and uppercase latin letters and digits.

Output

If it's impossible to split the string s to the strings of length p and q print the only number "-1".

Otherwise in the first line print integer k — the number of strings in partition of s.

Each of the next k lines should contain the strings in partition. Each string should be of the length p or q. The string should be in order of their appearing in string s — from left to right.

If there are several solutions print any of them.

Examples

Input

5 2 3
Hello


Output

2
He
llo


Input

10 9 5
Codeforces


Output

2
Codef
orces


Input

6 4 5
Privet


Output

-1


Input

8 1 1
abacabac


Output

8
a
b
a
c
a
b
a
c
import java.util.*;
import java.io.*;

public class CF612A{ 
  public static int index;
  public static void main(String[] args)throws IOException, Exception {
    InputReader in = new InputReader(System.in);
    PrintWriter pw = new PrintWriter(new OutputStreamWriter(System.out));
    int n = in.nextInt(), p = in.nextInt(), q = in.nextInt();
    String s = in.nextLine();
    int len = s.length();
    boolean flag  = false;
    int x = 0, y = 0;
    for(int i = 0; i<= len; i++){
      for(int j = 0; j <= len; j++){
        if(i*p + j*q == len){
          flag = true;
          x = i;
          y = j;
        }
      }
    }
    if(!flag){
      System.out.println("-1");
      return;
    }
    pw.println(x+y);
    for(int i = 0; i < x; i++){
      pw.println(s.substring(0,p));
      s = s.substring(p);
    }
    for(int i = 0; i < y; i++){
      pw.println(s.substring(0,q));
      s = s.substring(q);
    }
    
                   
    
    
    pw.close();
  }
  
  
  
  static class InputReader {
    public BufferedReader reader;
    public StringTokenizer tokenizer;
    
    public InputReader(InputStream stream) {
      reader = new BufferedReader(new InputStreamReader(stream));
      tokenizer = null;
    }
    
    public String next() {
      
      try {
        while (tokenizer == null || !tokenizer.hasMoreTokens())
          tokenizer = new StringTokenizer(reader.readLine());
      } catch (IOException e) {
        return null;
      }
      
      return tokenizer.nextToken();
    }
    
    public String nextLine() {
      String line = null;
      try {
        tokenizer = null;
        line =  reader.readLine();
      } catch (IOException e) {
        throw new RuntimeException(e);
      }
      return line;
    }
    
    public int nextInt() {
      return Integer.parseInt(next());
    }
    
    public double nextDouble() {
      return Double.parseDouble(next());
    }
    
    public long nextLong() {
      return Long.parseLong(next());
    }
    public boolean hasNext(){
      try {
        while (tokenizer == null || !tokenizer.hasMoreTokens())
          tokenizer = new StringTokenizer(reader.readLine());
      } 
      catch (Exception e) {
        return false;
      }
      
      return true; 
      
    }
  }
}