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  1. USING: io kernel math math.parser ;
  2.  
  3. readln string>number
  4. *
  5. dup
  6. *
  7. dup
  8. .
Runtime error #stdin #stdout 0.18s 159232KB
stdin
2
stdout
./prog.factor

8: .
    ^
No word named “.” found in current vocabulary search path