a # 1 60 R ' deblank                                                    '
a # a,[1]  ' a#(a^='' '')/a#,a H b#(b^='' '')/b#,b                          '
a # a,[1]  ' $0                                                         '
a # a,[1]  '"deblank used in e.g. comb                                  '
a # a,[1]  '"from ''the apl handbook of techniques'' copyright 1978, ibm. '
Lfx a