Enter a 6-byte string, then this will emit a Java program printing the string.

SeedGenerator.java

import java.util.Random;
import java.util.Scanner;

public class SeedGenerator {
	public static void main(String[] args) throws Exception{
		Scanner scanner = new Scanner(System.in);
		System.out.print("Write a 6-byte string: ");
		
		String string = scanner.next();
		byte[] b = string.getBytes("UTF-8");
		if(b.length != 6){
			// FIXME: when b.length<6?
			System.out.println("Error: Invalid Length ("+b.length+")");
			return;
		}
		
		long a = b[0]+b[1]*256L+b[2]*65536L+b[3]*16777216L;
		a = a*65536L;
		
		byte[] c = new byte[2];
		Random random;
		
		for(long i=0;i<65536;i++){
			long seed = a+i;
			
			random = new Random(seed ^ 0x5DEECE66DL);
			random.nextBytes(c);
			if(c[0] == b[4] && c[1] == b[5]){
				seed = ((seed-0xBL)*0xDFE05BCB1365L)&((1L<<48) - 1);
				seed ^= 0x5DEECE66DL;
				String aa = "0x"+Long.toHexString(seed).toUpperCase();
				System.out.println("Seed value: "+aa);
				System.out.println("\nimport java.util.Random;");
				System.out.println("public class X {");
				System.out.println("\tpublic static void main(String[] args) {");
				System.out.println("\t\tbyte[] b = new byte[6];");
				System.out.println("\t\tnew Random("+aa+"L).nextBytes(b);");
				System.out.println("\t\tSystem.out.println(new String(b));\n\t}\n}");
				return;
			}
		}
		
		System.out.println("The seed could not be found... :(");
	}
}