Theorem s6cli

Description: A length 6 string is a word. (Contributed by Mario Carneiro, 26-Feb-2016)

	Ref	Expression
Assertion	s6cli	$$⊢⟨“ABCDEF”⟩\in \mathrm{Word}\mathrm{V}$$

Proof

Step	Hyp	Ref	Expression
1		df-s6	$$⊢⟨“ABCDEF”⟩=⟨“ABCDE”⟩\mathrm{++}⟨“F”⟩$$
2		s5cli	$$⊢⟨“ABCDE”⟩\in \mathrm{Word}\mathrm{V}$$
3	1 2	cats1cli	$$⊢⟨“ABCDEF”⟩\in \mathrm{Word}\mathrm{V}$$