O

 Ow[.m] (Octal Editing)

 On input, O transfers "w" characters from the external field and
 assigns them, as an octal value, to the corresponding I/O list
 element (which can be any data type).  The external field can
 contain only the numerals 0 though 7; it cannot contain a sign, a
 decimal point, or exponent field.  An all blank field is treated as
 a value of zero.  If the value of the external field exceeds the
 range of the corresponding list element, an error occurs.

 On output, O transfers the octal value of the corresponding I/O
 list element, right-justified, to an external field that is "w"
 characters long.  No signs are transmitted; a negative value is
 transmitted in internal form.  If the value does not fill the
 field, leading spaces are inserted; if the value is too large for
 the field, the entire field is filled with asterisks.  If "m" is
 present, the external field consists of at least "m" digits and, if
 necessary, is zero filled on the left.

 "w" must be large enough to include a possible minus sign.  If "m"
 is present, the external field consists of at least "m" digits and,
 if necessary, is zero filled on the left.