(TXT) arithmetic.md
 (TXT) cppext.md
 (TXT) data.md
 (TXT) flow.md
 (TXT) index.md
 (TXT) io.md
 (TXT) list.md
 (TXT) manList
 (TXT) map.md
 (TXT) naming.md
 (TXT) procedure.md
 (TXT) requirements.txt
 (TXT) structure.md
 (TXT) text.md
 (TXT) time.md