diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/BinaryLoadGraphInputFormat.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/BinaryLoadGraphInputFormat.java
index deac3c8..2bbc1c2 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/BinaryLoadGraphInputFormat.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/BinaryLoadGraphInputFormat.java
@@ -1,8 +1,6 @@
 package edu.uci.ics.pregelix;
 
 import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
 
 import org.apache.hadoop.io.ByteWritable;
 import org.apache.hadoop.io.BytesWritable;
@@ -16,25 +14,23 @@
 import edu.uci.ics.pregelix.api.io.binary.BinaryVertexInputFormat;
 import edu.uci.ics.pregelix.api.io.binary.BinaryVertexInputFormat.BinaryVertexReader;
 import edu.uci.ics.pregelix.api.util.BspUtils;
-import edu.uci.ics.pregelix.bitwise.BitwiseOperation;
 import edu.uci.ics.pregelix.example.io.MessageWritable;
-import edu.uci.ics.pregelix.example.io.VLongWritable;
 import edu.uci.ics.genomix.type.KmerCountValue;
 
 public class BinaryLoadGraphInputFormat extends
 	BinaryVertexInputFormat<BytesWritable, ByteWritable, NullWritable, MessageWritable>{
-	//static int number = 0;
+	static int number = 0;
 	/**
 	 * Format INPUT
 	 */
     @Override
     public VertexReader<BytesWritable, ByteWritable, NullWritable, MessageWritable> createVertexReader(
             InputSplit split, TaskAttemptContext context) throws IOException {
-    	/*try{
+    	try{
     	System.out.println("split: "  + number++ + " length:"+ split.getLength());
     	}catch (Exception ex){
     		
-    	}*/
+    	}
         return new BinaryLoadGraphReader(binaryInputFormat.createRecordReader(split, context));
     }	
 }
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/GraphVertexOperation.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/GraphVertexOperation.java
index 8197ea8..8fa34c3 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/GraphVertexOperation.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/GraphVertexOperation.java
@@ -24,7 +24,7 @@
 import edu.uci.ics.pregelix.type.KmerCountValue;
 
 public class GraphVertexOperation {
-	public static final int k = 3; //kmer, k: the length of kmer
+	public static final int k = 55; //kmer, k: the length of kmer
 	static private final Path TMP_DIR = new Path(
 			GenerateSequenceFile.class.getSimpleName() + "_INTERIM");
 	/**
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/LogAlgorithmForMergeGraphInputFormat.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/LogAlgorithmForMergeGraphInputFormat.java
index 4044a06..5aad613 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/LogAlgorithmForMergeGraphInputFormat.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/LogAlgorithmForMergeGraphInputFormat.java
@@ -15,8 +15,8 @@
 import edu.uci.ics.pregelix.bitwise.BitwiseOperation;
 import edu.uci.ics.pregelix.example.io.LogAlgorithmMessageWritable;
 import edu.uci.ics.pregelix.example.io.ValueStateWritable;
-import edu.uci.ics.genomix.type.KmerCountValue;
 import edu.uci.ics.pregelix.type.State;
+import edu.uci.ics.genomix.type.KmerCountValue;
 
 public class LogAlgorithmForMergeGraphInputFormat extends
 	BinaryVertexInputFormat<BytesWritable, ValueStateWritable, NullWritable, LogAlgorithmMessageWritable>{
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/SequenceFile/GenerateSequenceFile.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/SequenceFile/GenerateSequenceFile.java
index aedd1c9..b8fc24d 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/SequenceFile/GenerateSequenceFile.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/SequenceFile/GenerateSequenceFile.java
@@ -11,8 +11,8 @@
 import org.apache.hadoop.io.SequenceFile;
 import org.apache.hadoop.io.SequenceFile.CompressionType;
 
-import edu.uci.ics.genomix.pregelix.GraphVertexOperation;
 import edu.uci.ics.genomix.type.KmerCountValue;
+import edu.uci.ics.pregelix.GraphVertexOperation;
 import edu.uci.ics.pregelix.bitwise.BitwiseOperation;
 
 public class GenerateSequenceFile {
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/TestLoadGraphVertex.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/TestLoadGraphVertex.java
index 085d3be..3992a56 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/TestLoadGraphVertex.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/TestLoadGraphVertex.java
@@ -10,7 +10,6 @@
 import edu.uci.ics.pregelix.api.graph.Vertex;
 import edu.uci.ics.pregelix.api.job.PregelixJob;
 import edu.uci.ics.pregelix.bitwise.BitwiseOperation;
-import edu.uci.ics.pregelix.example.GraphMutationVertex;
 import edu.uci.ics.pregelix.example.client.Client;
 import edu.uci.ics.pregelix.example.io.MessageWritable;
 
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/example/io/LogAlgorithmMessageWritable.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/example/io/LogAlgorithmMessageWritable.java
index 9b53fe6..262ce7f 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/example/io/LogAlgorithmMessageWritable.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/example/io/LogAlgorithmMessageWritable.java
@@ -7,7 +7,7 @@
 
 import org.apache.hadoop.io.WritableComparable;
 
-import edu.uci.ics.genomix.pregelix.GraphVertexOperation;
+import edu.uci.ics.pregelix.GraphVertexOperation;
 
 public class LogAlgorithmMessageWritable implements WritableComparable<LogAlgorithmMessageWritable>{
 	/**
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/example/io/MessageWritable.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/example/io/MessageWritable.java
index ba3053b..e18a062 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/example/io/MessageWritable.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/example/io/MessageWritable.java
@@ -7,8 +7,7 @@
 
 import org.apache.hadoop.io.WritableComparable;
 
-import edu.uci.ics.genomix.pregelix.GraphVertexOperation;
-import edu.uci.ics.pregelix.api.graph.Vertex;
+import edu.uci.ics.pregelix.GraphVertexOperation;
 
 public class MessageWritable implements WritableComparable<MessageWritable>{
 	/**
diff --git a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/JobGen/JobGenerator.java b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/JobGen/JobGenerator.java
index 62624a8..625c1d4 100644
--- a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/JobGen/JobGenerator.java
+++ b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/JobGen/JobGenerator.java
@@ -10,17 +10,17 @@
 import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
 import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
 
-import edu.uci.ics.genomix.pregelix.BinaryLoadGraphInputFormat;
-import edu.uci.ics.genomix.pregelix.BinaryLoadGraphOutputFormat;
-import edu.uci.ics.genomix.pregelix.LoadGraphVertex;
-import edu.uci.ics.genomix.pregelix.LogAlgorithmForMergeGraphInputFormat;
-import edu.uci.ics.genomix.pregelix.LogAlgorithmForMergeGraphOutputFormat;
-import edu.uci.ics.genomix.pregelix.LogAlgorithmForMergeGraphVertex;
-import edu.uci.ics.genomix.pregelix.MergeGraphVertex;
-import edu.uci.ics.genomix.pregelix.TestLoadGraphVertex;
-import edu.uci.ics.genomix.pregelix.TextLoadGraphInputFormat;
-import edu.uci.ics.genomix.pregelix.testDeleteVertexId;
-import edu.uci.ics.genomix.pregelix.LoadGraphVertex.SimpleLoadGraphVertexOutputFormat;
+import edu.uci.ics.pregelix.BinaryLoadGraphInputFormat;
+import edu.uci.ics.pregelix.BinaryLoadGraphOutputFormat;
+import edu.uci.ics.pregelix.LoadGraphVertex;
+import edu.uci.ics.pregelix.LogAlgorithmForMergeGraphInputFormat;
+import edu.uci.ics.pregelix.LogAlgorithmForMergeGraphOutputFormat;
+import edu.uci.ics.pregelix.LogAlgorithmForMergeGraphVertex;
+import edu.uci.ics.pregelix.MergeGraphVertex;
+import edu.uci.ics.pregelix.TestLoadGraphVertex;
+import edu.uci.ics.pregelix.TextLoadGraphInputFormat;
+import edu.uci.ics.pregelix.testDeleteVertexId;
+import edu.uci.ics.pregelix.LoadGraphVertex.SimpleLoadGraphVertexOutputFormat;
 import edu.uci.ics.pregelix.api.job.PregelixJob;
 
 
diff --git a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/LoadGraphVertexTest.java b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/LoadGraphVertexTest.java
index d75e2c2..e88098d 100644
--- a/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/LoadGraphVertexTest.java
+++ b/genomix/genomix-pregelix/src/test/java/edu/uci/ics/pregelix/LoadGraphVertexTest.java
@@ -14,7 +14,7 @@
 
 import org.junit.Test;
 
-import edu.uci.ics.genomix.pregelix.LoadGraphVertex.SimpleLoadGraphVertexOutputFormat;
+import edu.uci.ics.pregelix.LoadGraphVertex.SimpleLoadGraphVertexOutputFormat;
 import edu.uci.ics.pregelix.api.job.PregelixJob;
 import edu.uci.ics.pregelix.example.client.Client;