Press the instructed key.

Act as fast and accurately as possible.

The instruction is to press F, you press <<F>> in 2407 ms. That is correct.
The instruction is to press K, you press <<K>> in 2159 ms. That is correct.
The instruction is to press D, you press <<D>> in 849 ms. That is correct.
The instruction is to press J, you press <<D>> in 642 ms. That is incorrect.
The instruction is to press F, you press 