Using continious letters for addititives values is a good idea (F+3) can be predicted easily. Yet i agree that confusing « symbols » should be avoided. Forcing

Using continious letters for addititives values is a good idea (F+3) can be predicted easily. Yet i agree that confusing « symbols » should be avoided. Forcing UPPERCASE formeront plus using a prefix (Z might be a good one) ZA:03 ZB:23 ZL:55 ZI:12 ZO:08 would work greatly for me