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At: auto2 lemma 5 1 1 1 1 1 1 1
1. Alph: Type
2. n:
3. n1:
4. f: n1Alph
5. Bij(n1; Alph; f)
6. f:((nn1)(n1n)). Bij(nn1; (n1n); f)
7. f1: (nn1)(n1n)
8. g: (n1n)nn1
9. InvFuns(nn1; (n1n); f1; g)
10. z: (n1n)

((f o g(z))[n]) {l:(Alph*)| ||l|| = n }
By: Analyze
Generated subgoals:

1 ((f o g(z))[n]) Alph*
2 ||(f o g(z))[n]|| = n

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