1(define a0 1) 2(define a1 "a") 3(define a2 '(a)) 4(define a3 '(a b)) 5(define a4 '(a . b)) 6(define a5 '(a b c)) 7(define a6 '(a b . c)) 8(define a7 '(a 9 b . c)) 10(define a8 11 '(a b . c)) 12 13(define 14 a9 '(a b . c)) 15 16(define 17 aa 18 '(a b . c)) 19 20(define (b0) 1) 21(define (b1 a) 1) 22(define (b2 a b) 1) 23(define (b3 a . b) 1) 24(define (b4 a 25 b) 1) 26(define (b5 27 a b) 1) 28(define (b6 29 a . b) 1) 30(define (b7 31 a . b) 32 1) 33 34(define ( 35 b8 36 a . b) 37 1) 38 39(define 40 ( 41 b9 42 a . b) 43 1) 44 45(define 46 (ba 47 a . b) 48 1) 49 50(define ((c0)) 1) 51(define ((c1) a) 1) 52(define ((c2) a b) 1) 53(define ((c3) a . b) 1) 54(define ((c4) a 55 b) 1) 56(define ((c5) 57 a b) 1) 58(define ((c6) 59 a . b) 1) 60(define ((c7) 61 a . b) 62 1) 63 64(define (( 65 c8) 66 a . b) 67 1) 68 69(define ( 70 ( 71 c9) 72 a . b) 73 1) 74 75(define 76 ( 77 ( 78 ca) 79 a . b) 80 1) 81 82;; incomplete input 83(define 84