Question: 3 ) based on Data encryption standard DES, the input of sound 4 is 1 5 4 e 7 6 1 b 1 5

3)based on Data encryption standard "DES", the input of sound 4 is "154e 761b 15 bd 8929" and the input of S-BOX in Round 3 is "1556227c f211".Find K3 if possible?

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