(CommandList
  children: [
    (Pipeline
      children: [
        (C {(tr)} {(-cd)} {(SQ <'[.\\n0-9]'>)})
        (C {(sed)} {(SQ <'/^$/d'>)})
        (C {(paste)} {(-s)} {(-d) (Lit_Other '+')})
        (C {(bc)})
      ]
      negated: F
    )
  ]
)