Design a 4-bit Arithmetic Logic Unit (ALU) on CircuitVerse that performs the following operations:

1. Addition: Add two 4-bit numbers.
2. Subtraction: Subtract two 4-bit numbers.
3. AND: Perform a bitwise AND on two 4-bit numbers.
4. OR: Perform a bitwise OR on two 4-bit numbers.
5. Equality Check: Check if two 4-bit numbers are equal.
6. Comparator: Compare two 4-bit numbers and determine if A > B or A < B.