$ btcs <<<'1 notif "hey" else 2 endif "hey" equal'
script      1 OP_NOTIF @686579 OP_ELSE 2 OP_ENDIF @686579 OP_EQUAL
script_hex  5164036865796752680368657987
output      0
output_hex  00

$ btcs <<<'0 notif "hey" else 2 endif "hey" equal'
script      0 OP_NOTIF @686579 OP_ELSE 2 OP_ENDIF @686579 OP_EQUAL
script_hex  0064036865796752680368657987
output      1
output_hex  51

$ btcs <<<'0 if "hey" else 2 endif "hey" equal'
script      0 OP_IF @686579 OP_ELSE 2 OP_ENDIF @686579 OP_EQUAL
script_hex  0063036865796752680368657987
output      0
output_hex  00

$ btcs <<<'1 if "hey" else 2 endif "hey" equal'
script      1 OP_IF @686579 OP_ELSE 2 OP_ENDIF @686579 OP_EQUAL
script_hex  5163036865796752680368657987
output      1
output_hex  51