###Instruction: Multi-class classification, answer with one of the labels:['no_consensus', 'delete', 'keep', 'comment', 'merge', 'redirect'] : ###Input:  Q16557881: sponge function (Q16557881) : class of algorithms with finite internal state that take an input bit stream of any length and produce an output bit stream of any desired length that can be used to model or implement many cryptographic primitives : ( delete | history | links | entity usage | logs ) Merged with Q3075281 . AlessioMela ( talk ) 19:29, 6 September 2014 (UTC)