tab=key=aapro=001key=bbpro=002key=ccpro=0008key=ddpro=0005key=eepro=0002key=ffpro=0001

This is a Lua table with six elements, each consisting of a key-value pair. The keys are strings "aa", "bb", "cc", "dd", "ee", and "ff", while the values are tables with one key-value pair each. The key in each value table is "pro" and the value is a floating point number representing a probability.