Another renumbering, so that all concurrent styles are bundled together

23-quarantine/README.md

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+Style #25
+==============================
+
+This style is a variation of style #09, The One, with the following additional constraints:
+
+Constraints:
+
+- Core program functions have no side effects of any kind, including IO
+
+- All IO actions must be contained in computation sequences that are
+  clearly separated from the pure functions
+
+- All sequences that have IO must be called from the main program
+
+Possible names:
+
+- Quarantine
+- Monadic IO
+- Imperative functional style