Thanks to @DaftWullie's comment. Here is my implementation of Grover's search for 110 on the IBM quantum platform with outcome
As DaftWullie said, the H gates around the decomposition of CCZ can be deleted for both ends, which brings us with outcome
For the decomposition of H and Toffoli gates, you can always find a solution over the network.
Happy Quantum! :)
WARNING: Anyone doing assignment 2 of MULT90063 should not use this