1 WRITE record-name-1 2? FROM identifier-1 (1) 3.0? 3.0.0 (2) BEFORE 3.0.0 AFTER 3.0.1 3.0.1? ADVANCING 3.0.2.0 identifier-2 3.0.2.0 integer-1 3.0.2.1? 3.0.2.1 LINE 3.0.2.1 LINES 3.0.2 mnemonic-name-1 3.0.2 PAGE 3.1 %phrase 1 3 %invalid_key 3.1 %not_invalid_key 4? END-WRITE phrase 1: 1? AT 1.1 END-OF-PAGE 1.1 EOP 1.2 imperative-statement-3 2? NOT 2.1? AT 2.2 END-OF-PAGE 2.2 EOP 2.3 imperative-statement-4 invalid_key: 1? INVALID 1.1? KEY 1.2 imperative-statement-1 not_invalid_key: 1? NOT INVALID 1.1? KEY 1.2 imperative-statement-2