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	The edible fruit of the
	
	
	sour sack, which is referred to by the same 
	name, as well as the epithets prickly
	
	
		custard apple, soursop and soursapi 
	(fig.), is 
	egg-shaped, dark green, and with a prickly skin. It can weigh up to 10 
	kilograms and grow to a length of up to 30 centimeters. 
																																																																												
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