Cracking hydrocarbons

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P N O F H G T H E R M A L L Q J Z V X A E Z G M M T V H U C Q D W H M X A L K E N E N W Z U K M C A T A L Y S T S A T U R A T E D Y M A I V A T P I I H M F E Z Y N Q I T E M F U D J G C Y V I S S U R J B R O M I N E L N G I R D E C O M P O S I T I O N A G Y B T T C K G N S C L G T P A U Q G H E A T Q B L L E X U Y Z O G I C P I O D E D E E C V V M A L K A N E A F T D A D O U B L E A D N G