{
  pow: in0.a groupBy ($ * $),
  lengthString: in0.b groupBy sizeOf($),
  lengthArray: in0.c groupBy sizeOf($),
  letter: in0.d groupBy $[-1],
  language: in0.e groupBy $.language,
  empty: [] groupBy $.language,
  lengthString2: in0.b groupBy ((string) -> sizeOf(string)),
  lengthString3: in0.b groupBy (str) -> sizeOf(str)
}