PartI ← (
  ▽×⊃(≤@9|≥@0|∘) # digits only
  ⋕⊟⊃(⊢|⊢⇌)      # add them together
)

PartII ← (
  .
  ⊐≡⌕⊙¤ {"one" "two" "three"
         "four" "five" "six"
         "seven" "eight" "nine"}
  /+≡×+1⇡9
  ≡((⋅∘|+@0⊙;)>0.)
  PartI
)

$ 1abc2
$ pqr3stu8vwx
$ a1b2c3d4e5f
$ treb7uchet

⊜PartI≠@\n.
/+

$ two1nine
$ eightwothree
$ abcone2threexyz
$ xtwone3four
$ 4nineeightseven2
$ zoneight234
$ 7pqrstsixteen

⊜PartII≠@\n.
/+

&fras "day01.in"

⊜(⊟⊃(PartI|PartII))≠@\n.
/+