diff --git a/37-dnn/count_words.py b/xx-dnn/count_words.py
similarity index 100%
rename from 37-dnn/count_words.py
rename to xx-dnn/count_words.py
diff --git a/37-dnn/generate_c2w_data.py b/xx-dnn/generate_c2w_data.py
similarity index 100%
rename from 37-dnn/generate_c2w_data.py
rename to xx-dnn/generate_c2w_data.py
diff --git a/37-dnn/generate_words.py b/xx-dnn/generate_words.py
similarity index 100%
rename from 37-dnn/generate_words.py
rename to xx-dnn/generate_words.py
diff --git a/37-dnn/normalize-char-ff.py b/xx-dnn/normalize-char-ff.py
similarity index 100%
rename from 37-dnn/normalize-char-ff.py
rename to xx-dnn/normalize-char-ff.py
diff --git a/37-dnn/normalize-chars.py b/xx-dnn/normalize-chars.py
similarity index 100%
rename from 37-dnn/normalize-chars.py
rename to xx-dnn/normalize-chars.py
diff --git a/36-dumb-counters/tf-36.py b/xx-dumb-counters/tf-36.py
similarity index 100%
rename from 36-dumb-counters/tf-36.py
rename to xx-dumb-counters/tf-36.py