diff --git a/data/data_processing.py b/data/data_processing.py
index a8a1202f2d635a5cc41882c90bfff5c2dcb9f060..a40b2d98e5fbe3017354d1b3576cc142025990da 100644
--- a/data/data_processing.py
+++ b/data/data_processing.py
@@ -2,7 +2,34 @@ import matplotlib.pyplot as plt
 import numpy as np
 import pandas as pd
 # from loess.loess_1d import loess_1d
-from constant import ALPHABET_UNMOD_REV
+
+ALPHABET_UNMOD = {
+    "": 0,
+    "A": 1,
+    "C": 2,
+    "D": 3,
+    "E": 4,
+    "F": 5,
+    "G": 6,
+    "H": 7,
+    "I": 8,
+    "K": 9,
+    "L": 10,
+    "M": 11,
+    "N": 12,
+    "P": 13,
+    "Q": 14,
+    "R": 15,
+    "S": 16,
+    "T": 17,
+    "V": 18,
+    "W": 19,
+    "Y": 20,
+    "OxM": 21,
+    "CaC": 22
+}
+
+ALPHABET_UNMOD_REV = {v: k for k, v in ALPHABET_UNMOD.items()}
 
 
 # def align(dataset, reference, column_dataset, column_ref, seq_data, seq_ref):