anchor.diff:  Syntax:	INPUT [prompt,] variable list
   
   Examples:
  +
   	60 INPUT U
   	65 INPUT V1, V2, V3
   	70 INPUT "Enter values: ", A, B
  
positive.code: 
  READing more values than are specified by DATA statements, in total, will cause an error.
  
  BASIC keeps an internal pointer to the next data item. This pointer can be reset with the RESTORE statement.
  
  REM
  ~~~
  
negative.code: Syntax:	ARR target variable [, target variable...] = expression
  
  Examples:
  
  	100 ARR A = B
  	110 ARR A = B * C
  	120 ARR A = B + D
  