Capitalization Families

Write a function that groups words by the number of capital letters and returns an array of object entries whose keys are the number of capital letters and the values are the groups.

Examples

grouping(["HaPPy", "mOOdy", "yummy", "mayBE"]) ➞ [
  [0, ["yummy"]],
  [2, ["mayBE", "mOOdy"]],
  [3, ["HaPPy"]]
]

grouping(["eeny", "meeny", "miny", "moe"]) ➞ [
  [0, ["eeny", "meeny", "miny", "moe"]]
]

grouping(["FORe", "MoR", "bOR", "tOR", "sOr", "lor"]) ➞ [
  [0, ["lor"]],
  [1, ["sOr"]],
  [2, ["bOR", "MoR", "tOR"]],
  [3, ["FORe"]]
]

Notes

• The object entries have to be sorted by the number of capital letters.
• The groups will be arrays of all words sharing the same number of capital letters.
• The groups have to be sorted alphabetically (ignoring case).
• Words will be unique.