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Task/SEDOLs/Ring/sedols.ring

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+see sedol("710889") + nl
+see sedol("B0YBKJ") + nl
+see sedol("406566") + nl
+see sedol("B0YBLH") + nl
+see sedol("228276") + nl
+see sedol("B0YBKL") + nl
+see sedol("557910") + nl
+see sedol("B0YBKR") + nl
+see sedol("585284") + nl
+see sedol("B0YBKT") + nl
+see sedol("B00030") + nl
+
+func sedol d
+     d = upper(d)
+     s = 0
+     weights  = [1, 3, 1, 7, 3, 9]
+     for i = 1 to 6
+         a = substr(d,i,1)
+         if ascii(a) >= 48 and ascii(a) <= 57
+            s += number(a) * weights[i]
+         else
+            s += (ascii(a) - 55) * weights[i] ok
+     next
+     return d + (10 - (s % 10)) % 10