diff --git a/letter_digit.py b/letter_digit.py
index e69de29..adceac5 100644
--- a/letter_digit.py
+++ b/letter_digit.py
@@ -0,0 +1,20 @@
+def letterAndDigit(string):
+    if not string:
+        return
+
+    string = string.upper()
+    LETTERS_PRESET = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+    DIGITS_PRESET = '1234567890'
+    output = {
+        'DIGITS': 0,
+        'LETTERS': 0,
+    }
+    for x in string:
+        if x in DIGITS_PRESET:
+            output['DIGITS'] = output['DIGITS'] + 1
+        elif x in LETTERS_PRESET:
+            output['LETTERS'] = output['LETTERS'] + 1
+        else:
+            pass
+
+    return output
diff --git a/letter_digit.pyc b/letter_digit.pyc
new file mode 100644
index 0000000..569efcb
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diff --git a/tests/__init__.pyc b/tests/__init__.pyc
new file mode 100644
index 0000000..c356e77
Binary files /dev/null and b/tests/__init__.pyc differ
diff --git a/tests/test_letterAndDigit.pyc b/tests/test_letterAndDigit.pyc
new file mode 100644
index 0000000..dfe5571
Binary files /dev/null and b/tests/test_letterAndDigit.pyc differ