Another renumbering, so that all concurrent styles are bundled together

24-spreadsheet/README.md

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+Style #26
+==============================
+
+Constraints:
+
+- The problem is modeled like a spreadsheet, with columns of data and formulas
+
+- Some data depends on other data according to formulas. When data
+  changes, the dependent data also changes automatically.
+
+
+Possible names:
+
+- Spreadsheet
+- Dataflow
+- Active data