Addval:   add  [salary],1000   ; this line has all five operands
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testit:                        ; a label and comment
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; a comment line by all by itself
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          sub  ax,bx
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          inc  [counter]       ; opcode and operand1 and comment
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          ret                  ; opcode and comment
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a_label_by_itself:
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    goback:   ret                       ; label and opcode and comment
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