diff --git a/14-letterbox/README.md b/11-letterbox/README.md
similarity index 100%
rename from 14-letterbox/README.md
rename to 11-letterbox/README.md
diff --git a/14-letterbox/tf-14.py b/11-letterbox/tf-11.py
similarity index 100%
rename from 14-letterbox/tf-14.py
rename to 11-letterbox/tf-11.py
diff --git a/11-abstract-things/README.md b/12-abstract-things/README.md
similarity index 100%
rename from 11-abstract-things/README.md
rename to 12-abstract-things/README.md
diff --git a/11-abstract-things/tf-11.py b/12-abstract-things/tf-12.py
similarity index 100%
rename from 11-abstract-things/tf-11.py
rename to 12-abstract-things/tf-12.py
diff --git a/12-hollywood/README.md b/13-hollywood/README.md
similarity index 100%
rename from 12-hollywood/README.md
rename to 13-hollywood/README.md
diff --git a/12-hollywood/tf-12.py b/13-hollywood/tf-13.py
similarity index 100%
rename from 12-hollywood/tf-12.py
rename to 13-hollywood/tf-13.py
diff --git a/13-bulletin-board/README.md b/14-bulletin-board/README.md
similarity index 100%
rename from 13-bulletin-board/README.md
rename to 14-bulletin-board/README.md
diff --git a/13-bulletin-board/tf-13.py b/14-bulletin-board/tf-14.py
similarity index 100%
rename from 13-bulletin-board/tf-13.py
rename to 14-bulletin-board/tf-14.py