Day 20

inputs/20.txt

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+%hm -> lg
+%ph -> gr, cd
+%xs -> st, zf
+%xc -> vv, bn
+%fx -> lx, st
+%dn -> zc
+%nd -> lg, tc
+%pd -> dn, lg
+%pc -> gr
+%lx -> gp
+%tc -> kj
+%tl -> nn
+%kk -> xs
+%gq -> pd
+%xq -> st, xj
+%nn -> bn, xc
+&st -> kk, fx, hz, lx, zb
+&hb -> rx
+%xj -> st, vq
+%sz -> gr, ph
+%bz -> kx
+%vq -> st
+%vv -> hh, bn
+%gp -> st, hz
+&js -> hb
+%lf -> bn, qg
+broadcaster -> nd, fx, mc, lf
+%cd -> vr
+%vr -> qc, gr
+%kx -> kc, lg
+%jr -> bn, tl
+&gr -> cz, dh, mc, qc, js, nj, cd
+%qg -> hq
+%mc -> gr, cz
+%nl -> st, ch
+%hz -> nl
+%kt -> gr, jc
+%zc -> lg, qn
+%vj -> rs
+&zb -> hb
+%kc -> gq
+%qc -> kt
+&bn -> qg, hq, rs, lf, bs, vj, tl
+%cz -> dh
+&bs -> hb
+%jc -> gr, pc
+%nj -> sz
+%kj -> lg, bz
+%hh -> jv, bn
+%hq -> vj
+%dh -> nj
+%ch -> st, kk
+%jv -> bn
+%rs -> jr
+%zf -> xq, st
+%qn -> hm, lg
+&lg -> gq, bz, tc, nd, rr, kc, dn
+&rr -> hb

inputs/20a.txt

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+broadcaster -> a, b, c
+%a -> b
+%b -> c
+%c -> inv
+&inv -> a

inputs/20b.txt

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+broadcaster -> a
+%a -> inv, con
+&inv -> b
+%b -> con
+&con -> output