0
  Γ := • sum [0-0]
  sum := • sum plus sum [0-0]
  sum := • "INT" [0-0]
1
  sum := "INT" • [0-1]
  Γ := sum • [0-1]
  sum := sum • plus sum [0-1]
  plus := • "PLUS" [1-1]
2
  plus := "PLUS" • [1-2]
  sum := sum plus • sum [0-2]
  sum := • sum plus sum [2-2]
  sum := • "INT" [2-2]
3
  sum := "INT" • [2-3]
  sum := sum plus sum • [0-3]
  sum := sum • plus sum [2-3]
  Γ := sum • [0-3]
  sum := sum • plus sum [0-3]
  plus := • "PLUS" [3-3]
4
  plus := "PLUS" • [3-4]
  sum := sum plus • sum [2-4]
  sum := sum plus • sum [0-4]
  sum := • sum plus sum [4-4]
  sum := • "INT" [4-4]
5
  sum := "INT" • [4-5]
  sum := sum plus sum • [2-5]
  sum := sum plus sum • [0-5]
  sum := sum • plus sum [4-5]
  sum := sum • plus sum [2-5]
  Γ := sum • [0-5]
  sum := sum • plus sum [0-5]
  plus := • "PLUS" [5-5]