BZ

 (Blank Control Editing)

 Causes embedded and trailing blanks to be treated as zeros within a
 numeric input field.  (Leading blanks are always ignored.) An
 all-blank field is 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.