public class Util {
  	public static long[][] getArraysFromImport(String str){
  		long[][] arrays = new long[4][];
  		String[] split = str.split("\n");
  		if(split.length < 4)
  			return null;
  		
  		for(int i=0; i<arrays.length; i++) {

  			arrays[i] = getArrayFromLine(split[i], i);

  			if(arrays[i] == null)
  				return null;
  		}
  		return arrays;
  	}

  	private static long[] getArrayFromLine(String str, int nLine) {

  		str = str.substring(1, str.length() - 2); // remove { and }

  		String[] longsStr;
  		if(nLine <= 1)
  			longsStr = str.split(", ");
  		else
  			longsStr = str.split("L, ");
  		

  		try {
  			long[] longs = new long[longsStr.length];
  			for(int i=0; i<longs.length; i++)
  				longs[i] = Long.parseLong(longsStr[i]);
  			return longs;
  		} catch (NumberFormatException ignored) {}
  		return null;
  	}
  }