diff --git a/2E.py b/2E.py
new file mode 100755
index 0000000..316575f
--- /dev/null
+++ b/2E.py
@@ -0,0 +1,26 @@
+#!/usr/bin/env python3.7
+
+import sys
+
+
+if len(sys.argv) is not 3:
+    print('usage : 2E.py [input file] [output file]')
+    exit(-1)
+
+inFile = open(sys.argv[1], mode='rb')
+outFile = open(sys.argv[2], mode='w')
+
+for buffer in iter(lambda: inFile.read(1), b''):
+    binStr = bin(int(buffer.hex(), base=16))[2:].zfill(8)
+    for c in binStr:
+        if c == '1':
+            outFile.write('E')
+        elif c == '0':
+            outFile.write('e')
+        else:
+            print('error!')
+            exit(-1)
+
+
+inFile.close()
+outFile.close()
\ No newline at end of file
diff --git a/E2.py b/E2.py
new file mode 100755
index 0000000..c245a79
--- /dev/null
+++ b/E2.py
@@ -0,0 +1,29 @@
+#!/usr/bin/env python3.7
+
+import sys
+import struct
+from array import *
+
+if len(sys.argv) is not 3:
+    print('usage : E2.py [input file] [output file]')
+    exit(-1)
+
+inFile = open(sys.argv[1], mode='rb')
+outFile = open(sys.argv[2], mode='wb')
+
+for buffer in iter(lambda: inFile.read(8), b''):
+    bin_array = array('B')
+    bin_str = ''
+    for c in buffer:
+        if c == ord('E'):
+            bin_str += '1'
+        elif c == ord('e'):
+            bin_str += '0'
+        else:
+            print('error!')
+            exit(-1)
+    bin_array.append(int(bin_str, base=2))
+    bin_array.tofile(outFile)
+
+inFile.close()
+outFile.close()
\ No newline at end of file