/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String str= " 1p   qrn qr2 qst   1a1 4at   qa qb1  st1 sp su";
		String [] parts = str.split("\\s{2,}(?=[\\daqs])");
        System.out.println(Arrays.toString(parts)); 
	}
}

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