BN

 (Blank Control Editing)

 Causes embedded and trailing blanks to be ignored within a numeric
 input field.  Leading blanks are always ignored, and an all blank
 field is always treated as zero.

 It affects all subsequent I, B, O, Z, F, E, EN, ES, D, and G
 editing (in the same FORMAT statement) until another blank editing
 descriptor occurs.

 The BN and BZ descriptors supersede the default interpretation of
 blanks during execution of a particular input data transfer
 statement.