Use Switch Block for 3 different values ? Matlab Simulink

I have a model :

with a Switch which have 2 inputs y. One input y can take enumerated values "Green" or "Orange" and the other one can take enumerated values "Green" or "Red". And i would like to know how with a switch (or another solution) can i have in output :

Green + Green = Green

Red + Green = Red

Orange + Green = Orange

Red + Orange = Red

Thanks !