Merkle$-$Damgard Compression Function$]$ The Merkle$-$Damgard iterated construction is used to build a collision resistant function H for long messages from a given collision resistant function h for short messages. Let E: $\{0,1\}$n $\backslash$times $\{0,1\}$n $\{0,1\}$n be a block cipher. We define the compression function h from a block cipher as $(,)=(,).$ Is this h collision resistant? If not, show an attack. $[$Hint: find a collision for $(1,1)$ and $(2,2).$ Given a random tuple $(1,1,2),$ can you find $2?]$