(operation) ; [1:1 - 30]
 (command) ; [1:1 - 4]
 (label) ; [1:6 - 12]
 (message) ; [1:14 - 30]
(operation) ; [2:1 - 30]
 (command) ; [2:1 - 4]
 (label) ; [2:6 - 12]
 (message) ; [2:14 - 30]
(operation) ; [3:1 - 29]
 (command) ; [3:1 - 4]
 (label) ; [3:6 - 12]
 (message) ; [3:14 - 29]