a # 1 60 R ' r#uscore kv                                                '
a # a,[1]  ' r#kv,[Lio_0.5](kv^='' '')\''-''                                '
a # a,[1]  ' $0                                                         '
a # a,[1]  '"uscore                                                     '
a # a,[1]  '"from ''the apl handbook of techniques'' copyright 1978, ibm. '
Lfx a