1a: 0, exp 0 2b: 4, exp 4 3c: 4, exp 4 4d: 4, exp 4 5e: 8, exp 8 6f: 12, exp 12 7g: 4, exp 4 8h: 16, exp 16 9i: 20, exp 20 10j: 20, exp 20 11k: 24, exp 24 12l: 24, exp 24 13m: 28, exp 28 14n: 32, exp 32 15o: 32, exp 32 16p: 36, exp 36 17q: 24, exp 24 18r: 40, exp 40 19s: 20, exp 20 20t: 44, exp 44 21 22