User blog comment:King2218/BAL Notation Part 2/@comment-5029411-20140215021238

Part 3:

a(0,1){0} = a(a){0}

a(1,1){0} = a(0,1){a,a...a,a} (a a's inside {})

a(0,2){0} = a(a,1){0}

a(0,0,1){0} = a(a,a){0}